Canadian Journal of Journal canadien Chemistry de chimie Volume 69, 1991 Contents / Sommaire JANUARY / JANVIER ARTICLES R. Faggiani, H. E. Howard-Lock, C. J. L. Lock, and R. Orgias 2R,4S-2-(2'-Methyl-3’-hydroxy-5’-hydroxymethylenepyridine-C4’) - 5,5-dimethylthiazolidine-4-carboxylic acid, the product of the reaction of D-penicillamine and vitamin B6 Diego Cortes, Saw Hla Myint, Alain Laurens, Reynald Hocquemiller, Michel Leboeuf et André Cavé Corossolone et corossoline, deux nouvelles y-lactones monotétrahydrofuraniques cytotoxiques Frank R. Fronczek, Richard D. Gandour, Thomas M. Fyles, Philippa J. Hocking, Susan J. McDermid, and P. Daniel Wotton Polycarboxylate crown ethers from meso-tartaric acid David L. Burgoyne, Shichang Miao, Charles Pathirana, Raymond J. Andersen, William A. Ayer, Peter P. Singer, William C. M. C. Kokke, and Donald M. Ross _ The structure and partial synthesis of imbricatine, a benzyltetrahydroisoquinoline alkaloid from the starfish Dermasterias imbricata Nikola B. Mili¢, Zivadin D. Bugaréi¢, and Predrag T. Djurdjevic Hydrolysis of aluminum(IIJ) ion in sodium nitrate medium Preeti Lahiri and Susanta K. Sengupta Spinel ferrites as catalysts: A study on catalytic effect of coprecipitated ferrites on hydrogen peroxide decomposition Alain R. Bossard and Margaret H. Back The homogeneous conversion of methane to higher hydrocarbons in the presence of ethylene in the temperature range 925-1023 K B. Vogin, F. Baronnet et G. Scacchi Etude chimique et cinétique de l’oxydation homogéne en phase gazeuse d’alcanes légers. II. Propane et mécanisme généralisé René Roy and Allan W. Rey Controlled diastereoselection in 2-lithio-1,3-dithiane additions onto a-substituted ‘y-lactols. Model studies toward bryostatins from (R)-pantolactone Christopher Owen Bender, Dean Sutherland Clyne, and Douglas Dolman The photochemistry of 1-cyano-2,3-benzobicyclo- [4.2.0]octa-2,4,7-triene Gervais Bérubé and Alex G. Fallis A stereocontrolled intramolecular cycloaddition — sigmatropic rearrangement approach to a tricyclo[7.4.0'°.0'-}tridecane precursor for (+) gascardic acid A. J. Kresge and Y. Yin Vinyl ether hydrolysis. XXIV. 1-Methoxycyclooctene and the question of reversibility of the carbon protonation step Lawrence Amankwa and Frederick F. Cantwell Adsorption of tetrahexylammonium — bromothymol blue ion-pairs at the chloroform—water interface Ketut Bestari, Richard T. Oakley, and A. Wallace Cordes Skeletal scrambling of sulphur diimide radical anions Yuezhu Gu, Jingzhong Guo, Chuanpu Liu, Yongjia Yin, Dezhao Cao, and Jiye Cai Luminescence of excited fragments produced from methyl! halides in noble gas flowing afterglow John A. Schmidt, Alain B. Berinstain, Francis de Rege, Cyril Heitner, Linda J. Johnston, and J. C. Scaiano Photodegradation of the lignin model a-guaiacoxyacetoveratrone, unusual effects of solvent, oxygen, and singlet state participation R. Kumar and R. J. Puddephatt New precursors for organometallic chemical vapor deposition of rhodium S. Manohar and J. Ananthaswamy Activity coefficients of NaCl in NaClI-NaOAc-H,O at 25, 35, and 45°C M. J. Kirk and T.S. Sorensen Studies on the thermal coking of bitumen. I. The use of pyrene-d,, as a probe for evaluating the extent of hydrogen shuttling reaction Mark J. Hampden-Smith, Teresa A. Wark, Arnold Rheingold, and John C. Huffman Solid state and solution structural investigation of homoleptic tin(IV) alkoxide compounds. Part I. Sn(O—t-Bu), and [Sn(O—i-Pr, - HO—i-Pr], Marko J. Pregel and Erwin Buncel Cyclodextrin-based enzyme models. Part 1. Synthesis of a tosylate and an epoxide derived from heptakis(6-O-tert-butyldimethylsilyl)-B-cyclodextrin and their characterization using 2D NMR techniques. An improved route to cyclodextrins functionalized on the secondary face Annette D. Allen, Lynn M. Baigrie, Leyi Gong, and Thomas T. Tidwell Cyclopropyiketenes: preparation and nucleophilic additions M. Hamity and R. H. Lema_ The photochemistry of EDA complexes in micellar soolutions. II. The stilbene—methylviologen system in the presence of oxygen Mikhail D. Kandelaki and Alexander G. Volkov The influence of dielectric permittivity of the nonaqueous phase on the photooxidation of water at the interface of two immisicible liquids in the presence of a hydrated oligomer of chlorophyll. The role of a proton acceptor C-2 CAN. J. CHEM. VOL. 69, 1991 Sedigallage A. Peiris and Gordon R. Freeman Solvent structure effects on solvated electron reactions in mixed solvents: positive ions in 1-propanol / water and 2-propanol / water T. Timothy Nadasdi and Douglas W. Stephan Bimetallic titanium alkoxides: synthesis and structure of Cp,Ti(Ph)(w-OCH,C- (CH,),CH,O)(Ph)TiCp,; a precursor to macrocyclic metallocene derivatives Robert T. Toth and Douglas W. Stephan Towards supported catalyst models: the synthesis, characterization, redox chemistry, and structures of the complexes Ti(OAr’), (Ar’ = C,H,(2-t-Bu), C5H(2,3,5,6-Me),) D. Jean Burnell and Zdenek Valenta -Facial stereoselectivity in the Diels-Alder reactions of a rigid carbocyclic diene: spiro(bicyclo[2.2. 1 }heptane-2, 1’-[2,4]cyclopentadiene) Notice to authors / Note aux auteurs Instructions to authors Recommandations aux auteurs Author index / Index des auteurs FEBRUARY / FEVRIER ARTICLES L. Breau, N. K. Sharma, I. R. Butler, and T. Durst Synthesis and X-ray crystal structure determination of 3,4-diphenyl-6- (diphenylmethy])- 1 ,5-dioxa-2-thiane-2-oxide William A. Ayer, Peter A. Craw, and Koohei Nozawa Two 1H-naphthol[2,3-c]pyran-1-one metabolites from the fungus Paecilomyces variotii Kazuhiko Takeda, Yutaka Harima, and Kazuo Yamashita Photoelectrochemical and optical properties of porphyrin thin films prepared by the electrolytic micelle disruption method Mohamed Ezeldin Hassan A new palladium-catalyzed coupling reaction of vinylic and allylic triflates with pyrimidine nucleosides Miguel A. Rios and Jestiis Rodriguez An Ab initio study of the structure and intramolecular proton transfer in tropolone Przemyslaw Pruszynski and Kenneth T. Leffek Phenyltetramethylguanidines: substituent effect on rates and isotope effects in their reaction with bis(4-nitrophenyl)cyanomethane in acetonitrile Frank Driessens and Claude Hootelé Sedum alkaloids. XI. Synthesis of sedinone and sedacrine by application of anodic oxidation Linda M. Beynon, Malcolm B. Perry, and James C. Richards Structure of the O-antigen of Actinobacillus plearopneumoniae serotype 12 lipopolysaccharide Donald R. Arnold, Laurie J. Lamont, and Allyson L. Perrot —_1,n-Radical ions. Photosensitized (electron transfer) carbon—carbon bond cleavage. Formation of 1,6-radical cations Wolfgang Kliegel, Gottfried Lubkowitz, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLII. 4,6-Bis(1-cyano-1-methylethyl)-2-mesity]-1,3-dioxa-4,6-diazo-2-boracyclohexane S. Alex, P. Turcotte, R. Fournier, and D. Vocelle Study of the protonation of simple Schiff bases in solvents of various polarity by means of Raman spectroscopy Janet E. Del Bene, Kyungsun Kim, and Isaiah Shavitt An ab initio study of symmetry breaking in calculations on the first excited singlet state of NH, Theodore A. Annan, James E. Kickham, and Dennis G. Tuck The direct electrochemical synthesis of the novel copper(I) complex Cu,[OC,C1,(OH)],[(C.H;),PCH,P(C,H;)>}> R. K. Boyd, D. J. Embree, A. J. McAlees, and A. Taylor Liquid assisted secondary ion mass spectrometry of [(n°- C;Me,R’)Rh(SCN).(CNR)] (R’ = Me, Et) complexes of isocyanides Ying Mu, Clare Aitken, Bruno Cote, John F. Harrod, and Edmond Samuel _ Reactions of silanes with bis(cyclopentadieny])dialkyl- zirconium complexes Jing-Long Du, Steven J. Rettig, Robert C. Thompson, and James Trotter Synthesis, structure, and magnetic properties of diphenylphosphinates of cobalt(II) and manganese(II). The crystal and molecular structures of the y forms of poly-bis(y- diphenylphosphinato)cobalt(II) and manganese(II) George Burns and K. M. Wilson-Yang A microstratigraphic investigation of iron ion migration in some ancient Egyptian wall paintings using PIXE analysis M. Koné, P. Courtin, and J. Lemerle Colloidal molybdoantimonic acids as ion exchangers Michel Baltas, Latifa Chahoua, Liliane Gorrichon, Pierre Tisnés, Douraid Houalla, Robert Wolf et Joél Jaud Etude conformationnelle et structurale de 1,5-diacétoxy-3,4-bis(bicyclophosphoranylato)quinate de méthyle K. Rambabu, P. Venkateswarlu, G. K. Raman, and Y. V. L. Ravi Kumar _Isobaric vapor—liquid equilibria of 1-bromobutane + chloroethane systems L. Persaud and G. Barbiero Synthesis, electrochemical and spectroscopic investigations of 2,2’:4,4"-terpyridine and 2,2':4,4":4,4":6,2”- quaterpyridine ligands for metal complex photoelectrochemistry CONTENTS / SOMMAIRE Naohito Uetake Chemical state detection of dibutyl phosphate using *‘P NMR chemical shift change Wieland Tyrra and Dieter Naumann _ Polar trifluoromethylation reactions: the formation of bis(trifluoromethy])iodine(III]) compounds and trifluoromethyl iodine(III) cations and anions Stanislaw F. Wnuk and Morris J. Robins Nucleic acid related compounds. 63. Synthesis of 5’-deoxy-5’-methyleneadenosine and related Wittig-extended nucleosides J. Peter Guthrie and Xiao-Ping Wang The aldol condensation of acetophenone with acetone R. A. Shaw, N. Ibrahim, and H. Wieser The VCD spectrum of 2-methylthietane: measured (800-1500 cm™') and computed with semi- empirical models David G. Dick, Roger Rousseau, and Dougias W. Stephan Lewis acidic titanium species: the synthesis, structure, bonding and molecular modelling considerations of the complexes Ti(NR,);Cl (R = Me, Et) Guoying Xu and Jan A. Herman An ICR mass spectrometry study of ion/molecule reactions between ethyl chloride and alkylamines ADDITIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS William W. Wilson, Karl O. Christe, Jin-An Feng, and Robert Bau Tetramethylammonium bifluoride, crystal structure and vibrational spectra Notice to authors / Note aux auteurs Author index / Index des auteurs MARCH / MARS ARTICLES Begofia Garcia, Rafael Alcalde, and José M. Leal Excess properties for binary liquid mixtures of propionic acid with aniline derivatives Christopher S. Frampton, Michael W. Majchrzak, and John Warkentin Sense of sequential 1,5-sigmatropic rearrangements of dimethyl-3,3-dialkyl-3-pyrazole-4,5-dicarboxylates. Crystal and molecular structures of two dimethy]-4,5-dialkyl-1H-pyrazole-1,3- dicarboxylates Antonio Abad, Consuelo Agullo, Manuel Arno, Luis R. Domingo, José Rozalen, and Ramon J. Zaragoza Transformation of resin abietic acid into a pregnane-type steroid Franco Cristiani, Francesco A. Devillanova, Angelo Diaz, Francesco Isaia, Gaetano Verani, Francesco Demartin, and Giuseppe Saba 2-S-Methyl-5,5-dimethylimidazolin-4-one: chemical behaviour and crystal structure of its A! tautomer H. Willner, S. J. Rettig, J. Trotter, and F. Aubke The crystal and molecular structure of gold tris(fluorosulfate) Fernande D. Rochon, Robert Melanson, and Pi-Chang Kong Reaction products of ammonium pertechnetate(VII) with triphenylphosphine and crystal structures of mer-Tc(PPh,),Cl,(DMF) - 2PPh, and NH,(CH;),,DMAH [TcCl,]~ - PPh,O G. W. Buchanan, S. Mathias, Y. Lear, and C. Bensimon Dibenzo-15-crown-5 ether and its sodium thiocyanate complex. X-ray crystallographic and NMR studies in the solid phase and in solution Peter Yates, Azza Seif-El-Nasr, Jennifer Stanton, and Jiri J. Krepinsky Reactions of 5-valerolactone with lithio trithio-orthoformates Yuan L. Chow and Xinxin Ouyang The photoaddition of 1,3-diketonatoboron difluorides with benzene derivatives Martin K. Ehlert, Steven J. Rettig, Alan Storr, Robert C. Thompson, and James Trotter Metal pyrazolate polymers. Part 2. Synthesis, structure, and magnetic properties of [Cu(4-Xpz),], polymers (where X = Cl, Br, Me, H; pz = pyrazolate) Utpal Sen _A study of the electrolytic solution process using the scaled particle theory. 4. Heat capacity of aqueous ions at elevated temperatures Trevor R. Griffiths and Richard A. Anderson Tetrahalogenomercury(II) complexes. A study of their electronic spectra, formation constants, ionic strength, and cation effects Peter J. Tumidajski Thermodynamic investigation of the ternary K-Pb—Sn and Rb—Pb-Sn alloys P. J. Tumidajski and S. N. Flengas Potential measurements of thorium tetrachloride in alkali halide solutions Arnold Jarczewski, Grzegorz Schroeder, and Kenneth T. Leffek The proton transfer reaction between bis(2,4-dinitrophenyl)methane and nitrogen bases in dimethyl! sulfoxide and toluene solvents Adama Quedraogo and Jean Lessard The conformational behaviour of 2-aryloxytetrahydropyrans and 2-acetoxytetrahydropyran, and barrier to ring inversion R. Sabbah et E. N. L. E. Buluku Etude thermodynamique des trois isoméres du dihydroxybenzéne Roger Barlet, Bahman Baharmast et Michel Vidal Monohalogénocyclopropanation des esters et des acides a-éthyléniques diversement alkylés. Activation et stéréosélection anti-thermodynamique Ted Schaefer, Rudy Sebastian, and Glenn H. Penner Theoretical and experimental approaches to the barrier to rotation about the Csp’—Csp’ bond in benzyl silane. Hyperconjugative stabilization of the perpendicular conformation Ted Schaefer, Christian Beaulieu, and Rudy Sebastian 2-Phenyladamantane as a model for axial phenylcyclohexane 'H NMR and molecular orbital studies of motion about the Csp?—Csp* bond C-4 CAN. J. CHEM. VOL. 69, 1991 Andrea Marchetti, Cario Preti, Mara Tagliazucchi, Lorenzo Tassi, and Giuseppe Tosi Dissociation equilibria of picric acid in the binary N, N-dimethylformamide /2-methoxyethanol solvent system Manuel Norte, Rafael Gonzalez, Agustin Padilla, José J. Fernandez, and Jestis T. Vazquez New halogenated sesquiterpenes from the red alga Laurencia caespitosa Michel Albrand, René Dolmazon et Patrick Pollet Synthése, structure et études spectroscopiques RMN 'H et '°C de dérivés perhydrocyclododéca[b]furaniques B. Zhao and M. H. Back The photochemistry of the rhodizonate dianion in aqueous solution Stephen P. Mezyk and David A. Armstrong Radical reductions of Cu(II)—penicillamine complexes: Evidence for a Cu(II)—disulphide ‘anion intermediate S. R. Logan Redox reactions with ferrocene / ferricenium species of radicals derived by H atom abstraction from alcohols and diols Wolfgang Kliegel, Ute Schumacher, Mahmood Tajerbashi, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLIII. 4-[(1-Hydroxycyclohexyl)methy]]-2,2,5-tripheny]-1,3-dioxa-4-azonia-2-borata-4-cyclopentene Hemant K. Sinha and Keith Yates On the ground and excited state dipole moments of planar vs. twisted nitroaniline analogues J. H. Hutchinson, D. L. F. Li, T. Money, M. Palme, M. R. Agharahimi, and K. F. Albizati Stereoselectivity of C(3) methylation and aldol condensation of camphor and derivatives Joao Sotomayor, Helena Santos, and Fernando Pina Application of **Co NMR to the investigation of interactions between cobalt sepulchrate and various counterions Amal Wahhab, Margaret Ottosen, and Frank W. Bachelor The synthesis of nor- and bisnorlupanes Claudio J. Salomon, Oreste A. Mascaretti, Charles E. Strouse, and G. Punte Stereospecific synthesis, 'H and '*C NMR spectroscopy, and X-ray crystallographic studies of 6,6-dibromo-3a-cyano-2,2-dimethylpenam-(1R)-S-oxide Notice to authors / Note aux auteurs IUPAC recommendations / Recommandations de ’ UICPA Author index / Index des auteurs APRIL / AVRIL ARTICLES Kevin R. Holme and Laurance D. Hall Novel metal chelating chitosan derivative: attachment of iminodiacetate moieties via a hydrophilic spacer group Peter D. Clarke, James F. Fait, Colin G. Jones, and Martin J. Kirk Reactions of benzo[b]thiophene with some aqueous platinum metal species at elevated temperatures Rosa M. Villamafian and Fernando Mata-Pérez Kinetic and electrochemical analysis of Ni(II) reduction at the dropping mercury electrode in the presence of thiourea Ying Ru Zhang, Ira Solomon, and Seymour Aronson Ionic dissociation in complexes of iodine with triphenylarsine and triphenylstibine A. S. W. de Freitas, A. W. McCulloch, and A. G. McInnes Recovery of silica from aqueous silicate solutions via trialkyl or tetraalkylammonium silicomolybdate Akiko Nishida, Yoshifumi Akagawa, Shinsuke Shirakawa, Shizuo Fujisaki, and Shoji Kajigaeshi Rotational isomerism in fluorene derivatives. XX. Conformational equilibria of 9-substituted 9-(o-methylthiomethylphenyl)- and 9-substituted 9-(o-methyisulfinylmethyl- phenyl)fluorenes Ted Schaefer, Rudy Sebastian, Salman R. Salman, James D. Baleja, Glenn H. Penner, and David M. McKinnon The proximate coupling constant, °J( H,CH,), and the torsional mobility of the thiomethyl group in some thioanisole derivatives Jean-Claude Cherton, M. Lanson, D. Ladjama, N. Lefebvre, Z. Vossough et J-J. Basselier Synthése d’isoxazoles substitués en a de l’oxygéne et d’isoxazoles substitués en a de |’azote et de l’oxygéne par des chaines alkyle ou alcényle Geoffrey Andrew Yeo and Thomas Anthony Ford Ab initio molecular orbital calculations of the infrared spectra of hydrogen bonded complexes of water, ammonia, and hydroxylamine. Part 6. The infrared spectrum of the water—-ammonia complex Alexander Apelblat Dimerization and continuous association including formation of cyclic dimers J. B. Milne, E. J. Gabe, and C. Bensimon The structure of the tetrachlorohydroxotellurate(IV) anion in KTeCl,(OH) - 0.5H,O and KTeC1,(OH) Jolanta Ochmanska and Peter G. Pickup Synthesis, electrochemistry, and ligand substitution reactions of conducting copolymer films of ruthenium polypyridine complexes and aromatic heterocycles P. Courtot, R. Pichon et J. Y. Salaun Influence électronique et stérique du ligand tétraméthyl cyclopentadiényle sur les propriétés physiques et sur la réactivité de complexes du titane et du zirconium Wolfgang Kliegel, Mahmood Tajerbashi, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLIV. 2,3-Dihydro-3-hydroxy-2,2-tetramethylene-4H-benzoxazin-4-one and its difluoroboron chelate, 2,2-difluoro-4,4-tetramethylene-1,3,5- trioxa-3a-azonia-2-borata-2,3,4,5-tetrahydro- 1H -cyclopenta[a]naphthalene CONTENTS / SOMMAIRE Wolfgang Kliegel, Ute Schumacher, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLV. 5,5- Difluoro-2,2-pentamethylene-7,7-dipheny]-1,4,6-trioxa-3a-azonia-5-borata-2,3,4,5,6,7-hexahydroindene Kimberly A. Watson, Suzanne Fortier, Michael P. Murchie, and John W. Bovenkamp Crown ether complexes exhibiting unusual 1:2 macrocycle salt ratios: X-ray crystal structures of cyclohexano-15-crown-5 - 2LiOPh, cyclohexano-15-crown-5 - 2NaOPh, and 15- crown-5 - 2NaOPh John V. Greenhill, Hossein Loghmani-Khouzani, and Derek J. Maitland Tautomerism in ketomethyl quinolines. Part 3. 4- Ketomethylquinolines G. W. Buchanan and J. K. Denike Poly(vinylbenzo macrocyclic polyethers). Synthesis and cation binding properties of 12-crown-4 derivatives Richard N. Gedye, Werner Rank, and Kenneth C. Westaway The rapid synthesis of organic compounds in microwave ovens. II Sultan Darvesh, Andrew S. Grant, David I. MaGee, and Zdenek Valenta Synthetic studies towards bruceantin. Part 1. Establishment of the carbon network Sultan Darvesh, Andrew S. Grant, David I. MaGee, and Zdenek Valenta Synthetic studies towards bruceantin. Part 2. The synthesis of a pentacyclic intermediate Antonello Filippi, Giorgio Occhiucci, and Maurizio Speranza Gas-phase heteroaromatic substitution. 10. Reaction of free phenylium ion with simple five-membered heteroarenes in the gaseous and liquid phase Antonello Filippi, Giorgio Occhiucci, Cinzia Sparapani, and Maurizio Speranza Gas-phase heteroaromatic substitution. 11. Electron transfer mechanism in the gas phase acylation of simple five-membered heteroarenes Kirk H. Michaelian, Shmuel Yariv, and Ahmed Nasser Study of the interactions between caesium bromide and kaolinite by photoacoustic and diffuse reflectance infrared spectroscopy Angelo Ransirimal Fernando and Byron Kratochvil Internal standards in differential pulse anodic stripping voltammetry COMMUNICATION Yasuhiro Yamaguchi, Takahiro Fujiyama, and Masaaki Yokoyama Bipolar charge carrier transport in amorphous molecular solid solution of arylamine and diphenoquinone derivatives Notice to authors / Note aux auteurs Author index / Index des auteurs May / MAI ARTICLES Jean-Christophe le Menn, André Tallec et Jean Sarrazin Obtention de cyclopropanes gem-dicarboxylate par cyclocondensation de carbanions bromo- et chloromalonate sur des accepteurs de Michaél Sandra A. Morris, E. Dilip de Silva, and Raymond J. Andersen Chromodorane diterpenes from the tropical dorid nudibranch iromodoris cavae Youla S. Tsantrizos and Kelvin K. Ogilvie Determination of the absolute stereochemistry of the fungal metabolite (R)-(—)-2-(4’- hydroxyphenyl)-2-hydroxyethanoic acid (pisolithin B) Veejendra Yadav and Alex G. Fallis Free-radical based cycloalkanol synthesis and annulation from thioacetal precursors Jacek W. Morzycki and Jolanta Obidzinska On the reaction of A-nor-Sa-cholestan-2-one with benzeneseleninic anhydride Giuseppina Castronuovo, Vittorio Elia, and Michela Magliulo Chiral recogniton in aqueous solutions at 25°C. A calorimetric study of the interaction between enantiomeric a-amino acids of different alkyl chain length Kenneth R. Fountain, Daniel P. Fountain, Bernice Michaels, D. Brenton Myers, Jon K. Salmon, Dean A. Van Galen, and Pat Yu_ Reactivity patterns of N-methylbenzhydroxamates. I. Studies of methyl transfer between N-methylbenzhydroxamates and arenesulfonates Siegelinde Bauermeister, Agnes M. Modro, Tom A. Modro, and Andrzej Zwierzak Phosphoric amides. Part 11. Intramolecular reactivity of phosphorotriamidates René Roy and Francois D. Tropper Carbohydrate protein interactions. Syntheses of agglutination inhibitors of wheat germ agglutinin by phase transfer catalysis Roderick E. Wasylishen, Jan C. T. Kwak, Zhisheng Gao, Elisabeth Verpoorte, J. Bruce MacDonald, and Ross M. Dickson NMR studies of hydrocarbons solubilized in aqueous micellar solutions Ronald D. Curtis and Roderick E. Wasylishen A nitrogen-15 nuclear magnetic resonance study of the tetracycline antibiotics Donald R. Arnold, Xinyao Du, and Kerstin M. Henseleit The effect of meta- and para-methoxy substitution on the reactivity of the radical cations of arylalkenes and alkanes. Radical ions in photochemistry. Part 26 Nada Stojanac and Zdenek Valenta Total synthesis of d,/-quassin George R. Pettit, Dipanjan Sengupta, Cherry L. Herald, Nancy A. Sharkey, and Peter M. Blumberg Synthetic conversion of bryostatin 2 to bryostatin 1 and related bryopyrans Michel Cariou and Jacques Simonet Comparison of chemical and electrochemical reduction of cyanamides: an example of cathodic decyanation C-6 CAN. J. CHEM. VOL. 69, 1991 Norma Sbarbati Nudelman and Jorge Javier P. Furlong Theoretical calculations of chemical interactions. VII. SCF-MO conformational studies of substituted 2’-hydroxychalcones S. N. Flengas Thermodynamic treatment of multicomponent fused salt solutions: common anion reactive systems approximation Sedigallage A. Peiris and Gordon R. Freeman Solvent structure effects on solvated electron reactions with ions in 2-butanol / water mixed solvents Linda Simpson, Steven J. Rettig, James Trotter, and Chris Orvig 1-n-Propyl-and 1-n-butyl-3-hydroxy-2-methy]-4-pyridinone complexes of group 13 (IIIA) metal ions K. D. Truong, A. D. Bandrauk, J. Zauhar, and C. Carione Vibrational spectra of two new organic semiconductors: tetrathiafulvalene (TTF) and tetramethyltetraselenafulvalene (TMTSF) salts of paranitrophenylmalononitrile (PNMA) Ted Schaefer, Kerry J. Cox, and Rudy Sebastian Experimental and theoretical conformer distributions of 3-methylbenzaldehyde ADDITIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS John R. Jones, David A. Wickenden, Carel W. Funke, and Frans M. Kaspersen Kinetics of the detritiation of [10,10-2H] mianserin and related compounds in high basic media Notice to authors / Note aux auteurs IUPAC recommendations / Recommandations de l’?UICPA Author index / Index des auteurs JUNE / JUIN ARTICLES Cecilia Anselmi, Marisanna Centini, Mirella Scotton, and Alessandro Sega Conformation and dynamics in solution of an N- quaternarized benzophenone derivative: a molecule active as UV filter Ted Schaefer and Kerry J. Cox C—H...O=—C and C—H...H—C interactions in the side chains of 2-isopropylbenzaldehyde. A negative *J(CHO,CH(CH;),) Ted Schaefer, Rudy Sebastian, and Christian Beaulieu Molecular orbital and 'H nuclear magnetic resonance studies of the inversion potentials of thianthrene and thioxanthene Hsing-Jang Liu, Patricia A. Rose, and Doug J. Sasaki Thiol esters in organic synthesis. XVI. Formation of «,8-unsaturated thiol esters via a Wadsworth-Emmons process Alberta Hernandez Gainza and Roy Ikemefula Konyeaso Substitution reactions of benzethonium chloride with ion associates of bromocresol green — quinine and bromophenol blue — quinine in dichloromethane John W. Bunting and P. Philippe Aubin Thermodynamic and kinetic acidities of N-(substituted benzyl) 4-phenylacetylpyridinium cations in aqueous solution James P. Kutney, Francisco J. Lopez, Shyh-Pyng Huang, Hiroshi Kurobe, Robert Flogaus, Krystyna Piotrowska, and Steven J. Rettig A versatile synthetic route to the anti-implantation agent, yuehchukene, and its analogues Gottfried Heinisch and Wolfgang Holzer '°C nuclear magnetic resonance spectra of 3,6-disubstituted pyridazines Julian M. Dust and Erwin Buncel Reactions of the super-electrophile, 2-(2’,4’-dinitropheny])-4,6-dinitrobenzotriazole 1-oxide, with methoxide and tert-butoxide: basicity and steric hindrance as factors in c-complex formation versus nucleophilic displacement J. B. Milne Hexachlorotellurate(IV) hydrolysis equilibria in hydrochloric acid. Measurement by Raman and '**Te NMR spectroscopy and a reconsideration of earlier spectrophotometric results G. L. Gutsev and Tom Ziegler The structure of the CCl, (n = 1-4) anions and electronic affinities of the corresponding neutrals Susan Ellis, Edward G. Livingstone, and Nicholas P. C. Westwood Ab initio studies of isocyanatoborane and difluoroisocyana- toborane; bent or linear BNCO chains? Inés L. Acevedo, Graciela C. Pedrosa, and Miguel Katz Excess molar volumes and excess viscosities of n-butylamine + 1,4-dioxane + carbon tetrachloride system at 298.15 K Peter D. Clark, Nicholas M. Irvine, and Pratkibha Sarkar The synthesis of 3H-naphthol{1,8-bc]thiophene derivatives Yao-ren Fang and Kenneth Charles Westaway Isotope effects in nucleophilic substitution reactions. VIII. The effect of the form of the reacting nucleophile on the transition state structure of an S,2 reaction Allen Apblett, Tristram Chivers, James F. Fait, and Rainer Vollmerhaus Negative hyperconjugation in hexachloro-3- cyclopentenylaminosulpheny] halides: Preparation and X-ray structure of C;Cl,NSBr and synthesis of C,;Cl,NS* AsF,- Tejraj M. Aminabhavi, Shrikant S. Joshi, Ramachandra H. Balundgi, and Shyam S. Shukla Densities and viscosities of binary and ternary liquid mixtures at 25°C Ivan Lantos and Haralambos E. Katerinopoulos Synthetic transformations of cyclopropyl annulated dihydroisoquinolines ADDITIONS AND CORRECTIONS/AJOUTS ET CORRECTIONS A. McAuley, S. Subramanian, and T. W. Whitcombe Synthesis and crystal structure of an octahedral nickel(II) complex derived from pentaerythrityl tetraamine CONTENTS / SOMMAIRE Notice to authors / Note aux auteurs Author index / Index des auteurs JULY / JUILLET ARTICLES Ted Schaefer, Kerry J. Cox, and Rudy Sebastian The conformational distribution of 2-cyanobenzaldehyde and 3-cyanobenzaldehyde in solution in the vapor Ted Schaefer, Glenn H. Penner, Rudy Sebastian, James Peeling, and Christian Beaulieu Long-range 'H, '°F and '3C, '°F coupling constants and molecular orbital computations as indicators of internal motion in C;H,OCF, and its 4-fluoro derivative Glenn H. Penner Selenium-77 and phosphorus-31 nuclear spin relaxation in tri-(tert-butyl) phosphine selenide A. Goumri, J. F. Pauwels, and P. Devolder Rate of the OH + C,H, + He reaction in the fall-off range by discharge flow and OH resonance fluorescence William W. Y. Siu, Terrance Y. H. Wong, Lisa C. F. Chao, and Yoshikata Koga Excess partial molar enthalpies in the water-rich region of the isobutyric acid — water system Michel Ringuet, Denis Girard, and Camille Chapados Vibrational and electronic spectra of new liposoluble metalloporphyrins in a nonpolar noncoordinating solvent Zdirad Z4k, Antonin Rizitka, and Tadeusz Glowiak The crystal structure of the ‘‘White Salt’’ trisilver(I) amidoselenate-3-ammonia- 2-water [Ag(NH;),]Ag,SeO,N - 3NH; -2H,O Abdelouahed Auhmani, Hassane Bitar, Roger Phan Tan Luu et Laura Barrios Comparaison des approches empirique et chimiométrique dans la modélisation des effets de solvant. Cas des propriétés spectrales en RMN, IR et UV-visible Koichi Iinuma_ Analysis of reactive ion transport in weakly ionized gas mixtures David Miller, Francois Bilodeau, and Robert H. Burnell Stereoselective syntheses of isomers of 3,7-dimethylnonadecane, a sex pheromone of the alfalfa blotch leafminer (Agromyza frontella (Rondani)) Frédéric Chaubet, Marguerite Nguyen Van Duong, Jacques Courtieu, Alain Gaudemer, Aurore Gref et A. L. Crumbliss Syn- thése et études structurales de noveaux complexes polyhydroxamiques du fer(III) potentiellement utilisables en imagerie par résonance magnétique nucléaire. I: Obtention des ligands Ian R. Butler and Chantal Soucy-Breau Bipyridylacetylenes 1: the synthesis of some bipyridylacetylenes via the palladium-catalyzed coupling of acetylenes with 2,2’-dibromobipyridyl, and the single crystal X-ray structure of 6,6’-bisphenylethynyl-2,2’-bipyridine Monica Barra and Rita H. de Rossi Catalysis by B-cyclodextrin in the reaction of p-nitrophenyl acetate with a-amino acids Detlef Rehorek, Edward G. Janzen, and Yashige Kotake On the spin trapping of chlorine atoms. Competition from chloride ions John A. Findlay, Zheng-Quan He, and Francoise Sauriol Forbeside D (C,,H;9,03,;SNa), a new saponin from Asterias forbesi. Complete structure by nuclear magnetic resonance (300 MHz) methods Stephen J. Loeb and George K. H. Shimizu Complexes of the crown thioether ligand 2,5,8-trithia[9]-o-benzenophane, (TT[9]OB). Synthesis and molecular structure of [Cu(NCS)(TT[9]OB)] David G. Dick and Douglas W. Stephan Structure and magnetic properties of [Cp,M(-PEt,)], (M = Ti, Zr) Alan R. Katritzky, Jinlong Jiang, and Philip Harris Synthesis of a-(arylideneamino)alkylamines Tahar Lakhlifi, Ahmed Sedqui, Bernard Laude, Nguyen Dinh An et Joél Vebrel Cycloaddition d’ylures d’azométhine dérivés de la 3,4-dihydro-6,7-diméthoxy-3-méthoxycarbony]-isoquinoléine Alain Giraudeau et Lana El Kahef §-Substitution de la méso-tétraphénylporphyrine de zinc par voie électrochimique Elba N. Alesso, Dora G. Tombari, Adriana F. Ibafiez, Graciela Y. Moltrasio Iglesias, and José M. Aguirre Synthesis and nuclear magnetic resonance spectroscopy of indane structures: mono- and disubstituted in the pentagonal ring David J. Hastings and Alan C. Weedon Stereochemical studies of the photochemical cycloaddition reaction of alkenes with N- benzoylindole and N-carboethoxyindole; evidence for biradical intermediacy Notice to authors / Note aux auteurs Author index / Index des auteurs AucGust / AOUT ARTICLES Kock-Yee Law, Thor W. Tarnawskyj, and Samuel Kaplan Azo pigments and their intermediates. A reinvestigation of the tetrazotization of 1,4-diaminoanthraquinone Alex D. Bain, Brian J. Fahie, Tomasz Kozluk, and William J. Leigh Improvements in the quantitation of NMR spectra by the use of statistical methods D. Gravel, R. Giasson, D. Blanchet, R. W. Yip, and D. K. Sharma Photochemistry of the o-nitrobenzyl system in solution: effects of O- - -H distance and geometrical constraint on the hydrogen transfer mechanism in the excited state. C-8 CAN. J. CHEM. VOL. 69, 1991 Philippe Delbecq, Daniel Bracos, Jean Pierre Celerier, and Gérard Lhommet Boric acid: a new regiospecific decarboxylating agent. Synthesis of cyclic imines, B-enaminones, and B-enaminodiketones from B-enaminoesters Paris E. Georghiou, Chi Keung (Jimmy) Ho, and Chester R. Jablonski Chemistry of chromotropic acid. 'H and ‘°C NMR spectroscopy of chromotropic acid and its derivatives Wolfgang Kliegel, Ute Schumacher, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLVI. 5,5- Pentamethylene-2-pheny]-4,5-dihydrooxazol-N-oxide(N—-O—B)trifluoroborane Wolfgang Kliegel, Gottfried Lubkowitz, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLVII. 6,8-Bis(1-cyano-1-methylethyl)-2,4-dipheny]l-1,3,5-trioxa-6,8-diaza-2,4-diboracyclooctane Wolfgang Kliegel, Ulf Riebe, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLVIII. 1,4- Dipheny1-3,3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia- 1 ,4-diboratabicyclo[2.2.1]heptane Wolfgang Kliegel, Gottfried Lubkowitz, Steven J. Rettig, and James Trotter Structural studies of organoboron compounds. XLIX. 4,6-Bis(1-pheny]-2-nitroethyl)-2-(4-methoxyphenyl)- | ,3-dioxa-4,6-diaza-2-boracyclohexane Mark C. Lefebvre, David A. Biro, and Cooper H. Langford Photoelectrochemical transduction between ionic and electronic conduction mediated by bis(maleonitriledithiolato)nickelate(II) in a polyviologen film Kenneth T. Leffek and Arnold Jarczewski Study of the properties of pyridine-2-azo-p-phenyltetramethylguanidine as a metal ion complexing agent Guy J. Collin, Héléne Deslauriers et George R. De Maré La photochimie du cis-penta-1,3-diéne, en phase gazeuse a 184,9 et 147,0 nm Mary V. Barnabas and David C. Walker Reactions of muonium with simple biochemical solutes in water and micelles T. M. Letcher and J. Mercer-Chalmers Excess molar volumes of (a cycloalkane + an alkanol) at 298.15 K Yuan L. Chow and Xiao-yun Liu The photocycloaddition of naphthoates with acetylacetone; dramatic acid promotions of product quantum yields Todd L. Arsenault, Donald W. Hughes, David B. MacLean, Walter A. Szarek, Andrew M. B. Kropinski, and Joseph S. Lam _ Structural studies on the polysaccharide portion of ‘‘A-band’’ lipopolysaccharide from a mutant (AK1401) of Pseudomonas aeruginosa strain PAOI Claude Rabiller, Philippe Eymard et Mahmoud Mesbahi Effets des sels de terres rares sur quelques phosphates dérivés des métabolites de la glycolyse Barbara J. Gour-Salin, Paule Lachance, and Andrew C. Storer Inhibition of papain by peptide nitriles: conversion of the nitrile group into other functionalities via the papain:nitrile thioimidate ester adduct Antony C. Chiverton, Suzanne Fortier, John W. Bovenkamp, D. Thoraval, G. W. Buchanan, and B. A. Dawson X-ray crystal structure determination and NMR solution studies of 3’,3”,5’,5”-tetrabromophenolphthalein ethyl ester Hong Wang, Richard J. Barton, Beverly E. Robertson, John A. Weil, and Keith C. Brown Crystal and molecular structures of two polymorphs of 2,2-di( p-nitrophenyl)-1-picrylhydrazine dichloromethane, C,gH,,;N7Oj9*CH,Cl, John M. McIntosh and Kenneth C. Cassidy An unexpected acyloin rearrangement and oxidation of a camphor derivative X. Lubeigt, F. Flies, M. J. Bourgeois, E. Montaudon et B. Maillard Déplacements homolytiques intramoléculaires. 19. Stéréochimie de la décomposition induite de peroxydes insaturés conduisant 4 la formation d’hétérocycles 4 trois et quatre chainons Brian A. Keay and Jean-Louis J. Bontront A facile preparation of 4-aryl-3-[(tert-butyldimethylsilyl)oxymethy]l]furans Y. L. Chow and Xianen Cheng _1,3-Diketonatoboron difluoride sensitized cation radical reactions Notice to authors / Note aux auteurs Author index/ Index des auteurs SEPTEMBER / SEPTEMBRE ARTICLES James R. Gillard, Michael J. Newlands, John N. Bridson, and D. Jean Burnell =- Facial stereoselectivity in the Diels—Alder reactions of benzene oxides Abdallah Albourine, Michelle Petit-Ramel, Germaine Thomas-David et Jean Jacques Vallon Complexes binaires du nickel(II) et du zinc(II) avec la 1-canavanine et la l-arginine, études potentiométriques et spectroscopiques Sandra A. Morris, Peter T. Northcote, and Raymond J. Andersen Triterpenoid glycosides from the Northeastern Pacific marine sponge Xestospongia vanilla Xinyao Du, Donald R. Arnold, Russell J. Boyd, and Zheng Shi Cleavage of the radical cations of alkenes: 1-butene and 4,4- dimethyl-1-pentene. Ab initio calculations on the interaction between the allyl and alkyl radical and carbocation moieties Daniel Peters and Georges Leroy A theoretical approach to the acid-catalyzed hydration of the carbonyl group: the case of formaldehyde CONTENTS / SOMMAIRE Yasuki Yoshimura Thermodynamical detection of hydrophobic hydration of tris(2,4-pentanedionato)cobalt([II) and tris(3,5-hep- tanedionato)cobalt(II]) in water Peter J. Gardner and Steve R. Preston The thermodynamics of the vaporization of liquid indium(1) bromide by modified entrainment Lukose Mathew, Emmanuel Y. Osei-Twum, and John Warkentin Thermolysis of a-hydroperoxyalkyl diazenes. Spin trapping of radical intermediates and spin trapping kinetics Jia-Sen Liu, Mei-Fen Huang, and Hong-Xing Zhou Kadsulignan C and D, two novel lignans from Kadsura longipedunculata Saul Wolfe and Chan-Kyung Kim A theoretical study of conformational deuterium isotope effects and bond dissociation energies of diastereotopic hydrogens R. W. Yip and Y-X. Wen Origin of the dual-band laser emission from 7-diethylamino-4-methylcoumarin (Cl) in solution: effect of hydrogen-bonding interaction by hydroxylic molecules Dragic V. Vukomanovic, John A. Page, and Gary W. Vanloon Voltammetric determination of AI(III) with adsorptive precon- centration of the pyrocatechol violet complex Dominique Costa, Bice Fubini, Elio Giamello, and Marco Volante A novel type of active site at the surface of crystalline SiO, (a- quartz) and its possible impact on pathogenicity Mark S. Workentin, Brian J. Fahie, and William J. Leigh Photochemical probes of conformational mobility in liquid crystals. The photochemistry of B-phenyl-4-methoxypropiophenone in the nematic and smectic B phases of CCH-n and OS-nm liquid crystals Saber M. Sharaf, Samir K. El-Sadany, Ezzat A. Hamed, and Abdel-Hamid A. Youssef Stereuchemistry and kinetics of amines addition to acetylenic esters Bo Lei and Alex G. Fallis Cadmium chloride mediated regiocontrol of dienolates and ketene thioacetals: yy condensation with aldehydes Steven Vigh, Herman Lam, Pavel Janda, A. B. P. Lever, Clifford C. Leznoff, and Ronald L. Cerny Synthesis and electrochemistry of linear and cofacial conjugated binuclear phthalocyanines covalently linked by alkyne and alkene bridges René Roy, Francois D. Tropper, and Chantal Grand-Maitre Syntheses of glycosyl phosphates by phase transfer catalysis Morris J. Robins, Fritz Hansske, Stanislaw F. Wnuk, and Tadashi Kanai Nucleic acid related compounds. 66. Improved syntheses of 5’-chloro-5'-deoxy- and 5’-S-aryl(or alkyl)-5'-thionucleosides Daniel Ducharme, Osamu Shibata, Gaétan Munger, and Roger M. Leblanc Monolayer properties of mixed chlorophyll a -— digalactosyldiacylglycerol at the nitrogen—water interface Thomas G. Back, Joseph H.-L. Chau, Brian P. Dyck, and Patricia L. Gladstone The synthesis of some novel N-chloro-A!-4- azasteroids by efficient N-chlorination of azasteroid lactams with trichloroisocyanuric acid Notice to authors / Note aux auteurs Author index / Index des auteurs OCTOBER / OCTOBRE ARTICLES i Dale E. Ward, Yuanzhu Gai, and Wajdi M. Zoghaib Diels—Alder reactions of activated 2H-thiopyrans Roland Contant et René Thouvenot Hétéropolyanions de type Dawson. 2. Synthéses de polyoxotungstoarsénates lacunaires dérivant de I’ octadécatungstodiarsénate. Etude structurale par RMN du tungsténe-183 des octadéca(molybdotungstovanado)diarsénates apparentés Michel Békhazi, Witold Lawrynowicz, and John Warkentin Reaction of carbony! ylides with chloroform Awad I. Ahmed, S. E. Samra, and S. A. El-Hakam_ Structural and surface aspects of thermally treated copper aluminum mixed hydroxides Truis Smith-Palmer and Cheryl Roberts A tensammetric study of the adsorption of cationic polymers and copolymers Louise Schriver, André Schriver, Stefan Peil, and Otto Schrems Hydrogen-bonded complexes of perfluro-t-butanol with acetone and nitromethane in low temperature solutions and matrices M. M. Gémez Hydroxyproline adsorption on a mercury electrode in neutral solution Jeff Alix and Susan Collins The photochemistry of RDX in solid argon at 10K Joykrishna Dey and Sneh K. Dogra_ Electronic adsorption and fluorescence spectra of 2-phenyl-substituted benzothiazoles: study of excited-state proton transfer reactions Zhipeng Deng and Derek G. Leaist Ternary mutual diffusion coefficients of MgCl, + MgSO, + H,O and Na,SO, + MgSO, + H,O from Taylor dispersion profiles Franciscus W. A. M. Miesen, Hans C. M. Baeten, Harm A. Langermans, Leo H. Koole, and Henk A. Claessens Novel, intramolecular hydrogen-transfer and cyclo-addition photochemistry of cyclic 1,3-dienes Hans H. Baier, Tong Chen, and Jerzy B. Giziewicz Enantiospecific syntheses of (+)-hyosamine and (—)-hyosamine Yuan L. Chow and Xianen Cheng The dual pathway in photocyloaddition of 1,3-diketonatoboron difluorides: excimer reactions Hui Lii and Derek G. Leaist Thermal diffusion with hydrolysis in aqueous solutions of sodium carbonate C-10 CAN. J. CHEM. VOL. 69, 1991 Raymond A. Poirier, Dake Yu, and Peter R. Surjan An ab initio study of the H,O-mediated 1,3-hydrogen rearrangement in the HX—CH= Y(H,0O) = X—CH=YH(H,0) isoelectric series: X, Y = CH,, NH, or O 1589 Jaswinder S. Jaswal and Alan S. Tracey Stereochemical requirements for the formation of vanadate complexes with peptides 1600 Notice to authors / Note aux auteurs i Author index / Index des auteurs NOVEMBER / NOVEMBRE This issue is dedicated to Dr. Richard Norman Jones Ce tirage est dédié au Dr. Richard Norman Jones ARTICLES John E. Bertie, C. Dale Keefe, and R. Norman Jones Infrared intensities of liquids VIII. Accurate baseline correction of transmisison spectra of liquids for computation of absolute intensities, and the 1036 cm”! band of benzene as a potential intensity standard Teresa B. Freedman, Kevin M. Spencer, N. Ragunathan, Laurence A. Nafie, Jeffrey A. Moore, and John M. Schwab Vibrational circular dichroism of (S,S)-[2,3-“H,]oxirane in the gas phase and in solution Ratnakar K. Gosavi, Manuel Torres, and Otto P. Strausz Molecular orbital studies of the singlet and triplet states of formylmethylene conformers S. E. Thornton and S. Fraga Theoretical studies of peptidic structures. Conformation of the tetrapeptide N-acetyl- Asp-Glu-Lys-Ser-NH- CH, Michael Jackson and Henry H. Mantsch Protein secondary structure from FT-IR spectroscopy: correlation with dihedral angles from three-dimensional Ramachandran plots Hisao Murai, Yoshinori Yamamoto, and Yasumasa J. ’Haya Time-resolved ESR study on photochemical formation of radical pair in cyclodextrin cavities Michael R. Mucalo and Ralph P. Cooney The effect of added salts on carbon monoxide adsorption on platinum and palladium hydrosols: an FTIR study Makoto Takahashi, Yasuo Okuzawa, Masaaki Fujii, and Mitsuo Ito Thermal lensing and photoacoustic spectra of gaseous acetylene by pulsed tunable infrared laser H. G. Hedderich, C. I. Frum, R. Engleman, Jr., and P. F. Bernath The infrared emission spectra of LiF and HF W. F. Murphy On vibrational force field calculations Tatsuyuki Yamamoto, Mitsuo Tasumi, and Masaru Tanokura Fourier-transform infrared and circular dichroism studies on temperature dependence of the secondary structure of troponin C from bullfrog skeletal muscle Qiyuan Chen, Yuming Xu, and Loren G. Hepler Calorimetric study of the digestion of gibbsite, Al(OH),(cr), and thermodynamics of aqueous aluminate ion, Al(OH), (aq) Emiko Okamura, Junzo Umemura, and Tohru Takenaka Molecular orientation in thin Langmuir—Blodgett films of dipalmitoylphos- phatidylcholine as studied by FTIR transmission and reflection—absorption spectroscopy Roger Frech and Scott H. Brown Anomalous temperature-dependent Raman scattering in lithium hydrazinium sulfate P. T. T. Wong Pressure effect on hydrogen isotope exchange kinetics in chymotrypsinogen investigated by FT-IR spectroscopy K. Szezepaniak, M. Szezesniak, W. Szajda, W. B. Person, and J. Leszezynski Infrared spectra of tautomers and rotamers of 9- methylguanine. An experimental and theoretical study H. E. Howard-Lock, C. J. L. Lock, and M. L. Martins Amino acid/zwitterion equilibria II: vibrational and NMR studies of substituted thiazolidine-4-carboxylic acids E. Johnson and R. Aroca_ Energy transfer between Langmuir—Blodgett monolayers of organic dyes J. Strempel and W. Kiefer Polarized and depolarized continuum resonance Raman scattering of molecular iodine: accurate determination of repulsive states Michael Falk, Ping F. Seto, and John A. Walter Solubility of domoic acid in water and in non-aqueous solvents Yoshitaka Fujita, Tetsuhiko Ohba, and Shun-Ichi Ikawa Measurements of far-infared optical contants of liquids with a synchrotron radiation source Masamichi Tsuboi, Fumiko Kaneuchi, Teruki Ikeda, and Kiso Akahane Infrared and Raman microscopy of fowl feather barb Nancy T. Kawai, Denis F. R. Gilson, and Ian S. Butler Phase transitions in adamantane derivatives: 1-fluoroadamantane