Canadian Journal Revue canadienne of Chemistry de chimie Contents Sommaire Volume 76, 1998 Volume 76, 1998 January / Janvier ARTICLES A.D.O. Bawagan, L. Fell, and J. Logan Time-resolved structures of electrical discharges in gases: experiment and stochastic model Francoise M. Winnik, André Morneau, Alicja M. Mika, Ronald F. Childs, Anna Roig, Elies Molins, and Ronald F. Ziolo Polyacrylic acid pore-filled microporous membranes and their use in membrane-mediated synthesis of nanocrystalline ferrihydrite Raphaél Sabbah et Maria Ermelinda da Silva Eusébio Energétique des liaisons inter- et intramoléculaires dans les trois isoméres de |’aminopyridine Lee D. Wilson and Ronald E. Verrall A 'H NMR study of cyclodextrin — hydrocarbon surfactant inclusion complexes in aqueous solutions Susan Swansburg, Kristin Janz, Gloria Jocys, Alexandra Pincock, and James Pincock Facial selectivity in the addition of nucleophiles to the radical cations of substituted 2-methyleneadamantanes Michael Falk, Warren Chew, John A. Walter, Witold Kwiatkowski, Katherine D. Barclay, and Gerald A. Klassen Molecular modelling and NMR studies of the caffeine dimer Marcos Lorono, J.R. Anacona, and Anibal Sierralta Coriolis coupling constants and inertial defect of B,F, by ab initio calculations and the iterative method Katsuyuki Nakayama, Yuichi Kondo, and Koji Ishihara Ak inetic study of the reactions of dimethyl sulfide bridged tetramethylplatinum(II) and octamethylplatinum(IV) complexes with dimethyl sulfide and bidentate ligands Yasuki Yoshimura Salt effect on the solubility of mer-(+)-tris(L-alaninato)cobalt(II]) Daniel Ren and Robert A. McClelland Carbocation-like reactivity patterns in X'-substituted-4-biphenylylnitrenium ions Richard A. Beekman, René T. Boeré, Klaus H. Moock, and Masood Parvez Synthesis, electrochemistry, structure, and magnetic susceptibility of 5-tert-buty]-1,3-bis-(1,2,3,5-dithiadiazolyl)benzene. Structural effect of the bulky substituent Richard W. Friesen and Suzanne Bissada_ Total synthesis of (+)-9-deoxygoniopypyrone. Application of the iodocyclofunctionalization reaction of a-allenic alcohol derivatives Saul Wolfe, Chan-Kyung Kim, Kiyull Yang, Noham Weinberg, and Zheng Shi_ Transverse compression and the secondary H/D isotope effects in intramolecular Sy2 methy|-transfer reactions Saul Wolfe, Zheng Shi, Kiyull Yang, Stephen Ro, Noham Weinberg, and Chan-Kyung Kim Hydration of the carbonyl group. Further evidence for a cooperative mechanism from experimental and theoretical studies of the hydrations of formaldehyde, acetaldehyde, acetone, and cyclohexanone Donald L. Hooper, Ian R. Pottie, Marc Vacheresse, and Keith Vaughan _1,2-Bis(1-aryl-3-alkyltriazen-3- yl)ethanes and related compounds ADDITTIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS Philippe Couture and John Warkentin Chemistry of cyclic aminooxycarbenes Author Index / Index des auteurs C-2 Can. J. Chem. Vol. 76 February / Février ARTICLES Sergey A. Avilov, Olga A. Drozdova, Vladimir I. Kalinin, Anatoly I. Kalinovsky, Valentin A. Stonik, Elena N. Gudimova, Ricardo Riguera, and Carlos Jiménez Frondoside C, a new nonholostane triterpene glycoside from the sea cucumber Cucumaria frondosa: structure and cytotoxicity of its desulfated derivative Alex B. Driega, Gerald W. Buchanan, and Corinne Bensimon Synthesis of cis-p-dioxano-12-crown-4 and X-ray crystallography of the (1:1) complex with lithium thiocyanate John M. McIntosh, E. Jay Kiser, and Zhigang Tian The stereochemistry of hippurate alkylation Catherine E. Drennan, Rachelle J. Hughes, Vincent C. Reinsborough, and Oladega O. Soriyan Rate enhancement of nickel(II) complexation in dilute anionic surfactant solutions Steven M. Barnett, Antonin Vicek, Jr., and Jan S. Butler Pressure-tuning infrared and Raman spectroscopic study of (2,2’-bipyridine)tetracarbonylchromium()) James Frederick King, Gay Yuyitung, Manjinder Singh Gill, Jeffrey Charles Stewart, and Nicholas Charles Payne Stereoelectronic effects in sulfonyl compounds: axial orientation of an N-methyl group in a six-membered sultam Fengde Xi and L. Ross C. Barclay Cooperative antioxidant effects of ascorbate and thiols with di-tert- butylcatechol during inhibited peroxidation in solution and in sodium dodecyl sulfate (SDS) micelles Eva Vallazza, Alex D. Bain, and Thomas W. Swaddle Dynamics of silicate exchange in highly alkaline potassium silicate solutions Costas Stathakis and Richard M. Cassidy Control of relative migration of small inorganic and organic anions with cyclodextrins in capillary electrophoresis (CE) Surya K. De, Mrinal G. Dhara, and Asok K. Mallik Synthesis of trans-2,3-dimethoxy-3- (phenylamino)flavanones and related compounds Paule Castan, Christine Viala, Paul-Louis Fabre, Francoise Nepveu, Jean-Pierre Souchard, and Gérald Bernardinelli Crystal structure, spectroscopic and magnetic studies, and antioxidative properties of catena-[diaqua(dihydro-orotato)manganese(II)] Mitchell D. Refvik and Adrian L. Schwan The reactions of a 1-alkenesulfenate anion with TMS-X reagents; a variable temperature NMR study Heidi M. Muchall, Nick H. Werstiuk, and Biswajit Choudhury As earch for an inexpensive calculational method for the reliable prediction of the first adiabatic and vertical ionization potentials of carbenes. Photoelectron spectra of two stable carbenes Kiyohisa Ohta, Youko Ueda, Satoshi Nakaguchi, and Takayuki Mizuno Photochemical reduction of CO, using Cu-loaded silicate rock powder suspended in water Cathy Hubert et Bernard Garrigues Influence des ultrasons sur la diastéréosélectivité. Synthése d’imidazolidine- 4-one chirales COMMUNICATION H.M. Muchall, N.H. Werstiuk, B. Choudhury, J. Ma, J. Warkentin, and J.P. Pezacki Thermolysis of 2,2- dimethoxy-5,5-dimethyl-A*- 1,3,4-oxadiazoline studied with photoelectron spectroscopy. He(I) photoelectron spectrum of dimethoxycarbene Author Index / Index des auteurs March / Mars ARTICLES Philippe Couture and John Warkentin A benzo-fused oxapenem from a f§-lactam-4-ylidene Richard J. Barton, Sushil K. Manocha, Beverly E. Robertson, and Lynn M. Mihichuk Synthesis, spectroscopy, and structures of the seven-coordinate complexes (CH3),AsC(CF;)=C(CF;)As(CH3)2W(CO),I,P(OC,.H;)3 and [(CH3),AsC(CF3)=C(CF3)As(CH3)2]2W(CO)Br, and spectroscopy of related seven-coordinate complexes Contents Mehmet Karatas, Serap Koni, and iIknur Dogan Chiral N-(o-aryl)-thiazolidinediones: synthesis from rhodanines and investigation on rotational enantiomers by NMR spectroscopy Kazuo Shinozuka, Junya Kohda, and Hiroaki Sawai Oxidation of olefins catalyzed by iron complexes of bleomycin model compounds bearing a hydrophobic or hydrophilic steric factor Edward P.C. Lai, Ania Fafara, Victoria A. VanderNoot, Mari Kono, and Brandee Polsky Surface plasmon resonance sensors using molecularly imprinted polymers for sorbent assay of theophylline, caffeine, and xanthine Jennifer L. McCann, Arvi Rauk, and Hal Wieser A conformational study of (1S, 2R, 5S)-(+)-menthol using vibrational circular dichroism spectroscopy R.F.W. Bader and F.J. Martin Interdeterminancy of basin and surface properties of an open system Richard A. Walker, Aaron C. MacDonald, Tanya MacGillivray, D. Gerrard Marangoni, and Truis Smith-Palmer Ac apillary electrophoresis study of the synthesis and stability of 1,2-decanedisulfate, 1- hydroxy-2-decanesulfate, and 2-hydroxy-1-decanesulfate Krishna C. Majumdar and Gour H. Jana Competitive study of Meisenheimer rearrangement in a substrate tertiary amine with allylic and propargylic moieties Sengen Sun, James F. Britten, Christopher N. Cow, Chérif F. Matta, and Paul H.M. Harrison The crystal structure of 3,4,7,8-tetramethylglycoluril A. Wallace Cordes, Robert C. Haddon, Robin G. Hicks, Richard T. Oakley, and Kristen E. Vajda Iodine charge-transfer salts of bis(1,2,3,5-diselenadiazolyl) diradicals; solid-state characterization of the thiophene-bridged derivative [(Se,.N»,C)C,H,S(CN>Se>)][T] Vito Ferro, Larry Weiler, Stephen G. Withers, and Herman Ziltener N-Glycosyl phosphonamidates: potential transition-state analogue inhibitors of glycopeptidases John E. Drake and Jincai Yang Synthesis, spectroscopic characterization, and structural studies of organogermanium tri- and monothiocarbonates. Crystal structures of Me,Ge[S,CSEt],, Ph;Ge[SCO,Me], Ph;Ge[SCO,(i-Pr)], and Ph,Ge[SCO,Me}], Lorne M. Fell, Peter C. Burgers, Paul J.A. Ruttink, and Johan K. Terlouw The decarbonylation of ionized 8 hydroxypyruvic acid: the hydrogen-bridged radical cation [CH,=O---H---O=C-OH]** studied by experiment and theory Beauty Chaudhuri and Rupendranath Banerjee Kinetics and mechanism of hydroxylamine oxidation by [Fe “y( u-O)(phen),(H,O),]** in aqueous media COMMUNICATION Heather Marshall and Marisa A. Devine Precise measurement of fluorescence from uranium taken up in sodium fluoride ADDITIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS Saul Wolfe, Chan-Kyung Kim, Kiyull Yang, Noham Weinberg, and Zheng Shi Additions and corrections: Transverse compression and the secondary H/D isotope effects in intramolecular Sy2 methyl-transfer reactions Author Index / Index des auteurs April / Avril ARTICLES Ian Manners 1997 Canadian Society for Chemistry Award Lecture: Ring-opening polymerization (ROP) of strained metallocenophanes: the discovery and development of a new route to high molecular weight poly(metallocenes) Jack M. Miller, David Wails, J. Stephen Hartman, Karla Schebesh, and Jennifer L. Belelie Friedel—Crafts catalysis using supported reagents. Synthesis, characterization, and catalytic application of sol—gel-derived silica Wolfgang Kliegel, Jérg Metge, Steven J. Rettig, and James Trotter Aromatic aldonitrones of 2- (hydroxyamino)benzyl alcohol and their cyclic isomers. Crystal and molecular structures of a 1-hydroxy-1,2-dihydro- 4H-3,1-benzoxazine, a boron chelate, and its parent nitrone ligand Helen A. Joly, Maria Kepes, Natalie Roy, and Jason Prpic The reactivity of the high-energy intermediates formed in the reactions of Group 13 metal atoms and aromatic alkenes C-4 Can. J. Chem. Vol. 76 Yixing Zhao and Gordon R. Freeman Solvent effects on electrical conductivities of sodium tetraphenylboride in water—methanol, ethanol, and 2-propanol mixed solvents Yixing Zhao and Gordon R. Freeman Optical absorption spectrum of solvated electrons in pure fert-butanol: effect of temperature H.R. Hoveyda, Veranja Karunaratne, Christopher J. Nichols, Steven J. Rettig, Ashley K.W. Stephens, and Chris Orvig Tripodal trisamides based on nicotinic and picolinic acid derivatives Theresa Fauconnier, Alex D. Bain, Paul Hazendonk, R.A. Bell, and Colin J.L. Lock Structure and dynamics of azapropazone derivatives studied by crystallography and nuclear magnetic resonance Kelly S.E. Tanaka and Andrew J. Bennet Synthesis and evaluation of a bicyclic deoxymannojirimycin derivative as a potential glycosidase inhibitor Giuseppe Graziano Thermodynamics of dissolving gaseous argon in different solvents Dian Chen, Arthur E. Martell, Ramunas J. Motekaitis, and Derek McManus Syntheses and Fe(II)/Fe(II1) equilibria of the new multidentate ligands pyridine-2-phosphonic-6-carboxylic acid and 2,6-pyridinediphosphonic acid for the use of their iron chelates as catalysts for the oxidation of H2S to Sg by air Sébastien Gregoire, Jean-Charles Mathurin, Raymond E. March et Jean-Claude Tabet Etude d’ions négatifs préparés « in situ » dans un piége ionique quadripolaire Brent Hawrylak, Kim Gracie, and R. Palepu Ultrasonic velocity and volumetric properties of isomeric butanediols plus water systems M.Z.A. Badr, A.A. Geies, M.S. Abbady, and A.A. Dahy New heterocycles from thienopyridocinnolines Youliang Wang and Raymond A. Poirier Generalized valence bond study of rotational singlet structures and 7 bond energies for systems containing C=C, Si=Si, and C=Si double bonds Sean A.C. McDowell and W.J. Meath Average energy approximations for anisotropic triple-dipole dispersion energy coefficients using three-body interactions involving O, NO, CO, N>, H>, and the rare gases as tests Okba Saied, Benoit Bachand, and James D. Wuest Complexes of ketodiesters and related compounds with TiCl,. Attempts to use chelation to promote the simultaneous coordination of ketones by two Lewis acids ADDITIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS Takashi Tokoroyama and Hisashi Kusaka_ Additions and corrections: Folding strain stereocontrol in cyclohexane ring formation by means of an intramolecular ester enolate alkylation reaction Author Index / Index des auteurs May / Mai ARTICLES Bruce A. Thomson 1997 McBryde Medal Award Lecture: Radio frequency quadrupole ion guides in modern mass spectrometry Behzad C. Ahvazi, Gerry Pageau, and Dimitris S. Argyropoulos On the formation of diphenylmethane structures in lignin under kraft, EMCC®, and soda pulping conditions Yimin Sun, Warren E. Piers, and Masood Parvez The solid-state structure of bis(pentafluorophenyl)zinc Edward Paul Segstro, Kerry Davie, Xiaoling Huang, and Alexander Frank Janzen Cyclic—acyclic equilibrium and selective P—O bond cleavage in 2-hydroxyphenyldiphenyl-phosphinate, Ph,P(O)OC;H,OH Duncan H. Hunter, Chantelle McRoberts, and Jagadese J. Vittal Bisthiosemicarbazones of 2,4-pentanedione are pyrazolines R.N. Gedye and J.B. Wei Rate enhancement of organic reactions by microwaves at atmospheric pressure C. Den Auwer, M.P. Andrews, V. Briois, C. Cartier dit Moulin, and H. Dexpert Structure bifurcation in containerless low-temperature syntheses of solid state niobium chloride compounds from lanthanoid atoms: an X- ray absorption and ab initio EXAFS analysis Reginald H. Mitchell, Danny Y.K. Lau, Thomas C.W. Mak, Bo-mu Wu, and Clemens Anklin Synthesis of the first [n]paracyclophane with an annulene as the aromatic, a necklace-like molecule; NMR, X-ray, and MMX structural comparisons Contents Paul Ruelle and Ulrich W. Kesselring Solubility prediction of n-fatty alcohols and sterols in complexing and non- complexing solvents according to the mobile order theory Michael Ramek, Ching-Hsing Yu, and Lothar Schafer Ab initio conformational analysis of the model tripeptide N-formy|-L-alanyl-L-alanine amide Patricia Gabriela Molina, Maria Alicia Z6n, and Héctor Fernandez Determination of the acid dissociation constants for some mycotoxins of the A/lternaria alternata genus Katherine N. Robertson, Pradip K. Bakshi, Susanne D. Lantos, T. Stanley Cameron, and Osvald Knop Crystal chemistry of tetraradial species. Part 9. The versatile BPh; anion, or how organoammonium H(N) atoms compete for hydrogen bonding Zhi-Hua Jiang and Dimitris S. Argyropoulos Coupling P-31 NMR with the Mannich reaction for the quantitative analysis of lignin Douglas B. Craig and Norman J. Dovichi Escherichia coli B-galactosidase is heterogeneous with respect to the activity of individual molecules Author Index / Index des auteurs June / Juin This issue is dedicated to Professor Erwin Buncel Ce tirage est dédié au Professeur Erwin Buncel ARTICLES Michael R. Crampton and Ian A. Robotham Kinetic studies of o-adduct formation and nucleophilic substitution in the reactions of ethyl 2,4,6-trinitrophenyl ether, some phenyl 2,4,6-trinitropheny! ethers, and pheny! 2,4- dinitronaphthy] ether with aniline in dimethyl sulfoxide Alan R. Katritzky, Daming Feng, Hengyuan Lang, Ming Qi, and Peter J. Steel Novel syntheses of 4-alkyl- 2(5H)-thiophenones and 8-phenylimino-1,2,4-triazolo[5, 1-c]-1,4-thiazines John M.W. Scott and Danny Summers On the relationship between the rate constants for racemization and isotopic exchange Robin A. Cox Lactams in sulfuric acid. The mechanism of amide hydrolysis in weak to moderately strong aqueous mineral acid media Yvonne Chiang, A. Jerry Kresge, Norman P. Schepp, Vladimir V. Popik, Zvi Rappoport, and Tzvia Selzer The acid dissociation constant of triphenylethenethiol, a simple thioenol, and that of its oxygen-enol analog Julian M. Dust and Richard A. Manderville Carbon versus oxygen nucleophilic selectivity in the reaction of the aryloxide ions, 2,6- and 3,5-di-tert-butylphenoxide, with the 2-[(nitro),aryl]-4,6-dinitrobenzotriazole 1-oxide series of super-electrophiles. Stereoelectronic factors on C-7 Meisenheimer complex formation versus C-1’ SyAr displacement N.H. Werstiuk, H.M. Muchall, C.D. Roy, J. Ma, and R.S. Brown =A calculational and ultraviolet photoelectron spectroscopic study of distorted amides Matthew J. Colthurst, Angeline J.S.S. Kanagasooriam, Michael S.O. Wong, Christian Contini, and Andrew Williams «a-Effect nucleophiles and azide ion: effective charge studies of displacement reactions at esters Christian Reichardt, Stefan Lébbecke, Abdol Mohammed Mehranpour, and Gerhard Schafer Pyridinium N- phenoxide betaines and their application to the determination of solvent polarities, XXIV. Syntheses and UV-vis spectroscopic properties of new lipophilic tert-butyl- and 1-adamanty] substituted, negatively solvatochromic pyridinium N-phenolate betaine dyes Wenyi Zhao and Henry J. Shine Primary and secondary 5-(alkyloxy)thianthrenium perchlorates. Characterization with 'H NMR spectroscopy, reactions with iodide and bromide ion, and thermal decomposition in solution Michael H. Abraham, Gary S. Whiting, Wendel J. Shuely, and Ruth M. Doherty The solubility of gases and vapours in ethanol—the connection between gaseous solubility and water—solvent partition Han Joong Koh, Ji-Won Lee, Hai Whang Lee, and Ikchoon Lee Kinetics and mechanism of the aminolysis of ethyl aryl carbonates in acetonitrile A. Rauk, J.L. McCann, H. Wieser, P. Bour, I.V. Vystorop, Yu.I. El'natanov, and R.G. Kostyanovsky Skeletal vibrational circular dichroism of a series of bicyclic dilactones: the fingerprint region? C-6 Can. J. Chem. Vol. 76 Jean M. Barthez, Anton V. Filikov, Lottie B. Frederiksen, Marie-Loire Huguet, John R. Jones, and Shui-Yu Lu) Microwave-enhanced metal- and acid-catalysed hydrogen isotope exchange reactions Ik-Hwan Um, Eun-Kyung Chung, and So-Mi Lee An unusual ground-state stabilization effect and origins of the a-effect in aminolyses of Y-substituted phenyl X-substituted benzoates Paul Miiller, Corine Baud, and Yvan Jacquier The rhodium(II)-catalyzed aziridination of olefins with {[(4- nitrophenyl)sulfonyl imino }phenyl-A° -iodane Dennis N. Kevill, Malcolm J. D'Souza, and Haobo Ren _ Correlation of the rates of solvolysis of arylmethy! p- toluenesulfonates: application of the aromatic ring parameter and a discussion of similarity models Yao-ren Fang, Zhu-gen Lai, and Kenneth Charles Westaway Isotope effects in nucleophilic substitution reactions X. The effect of changing the nucleophilic atom on ion-pairing in an Sy2 reaction Andrew Streitwieser, Daniel Zerong Wang, Manolis Stratakis, Antonio Facchetti, Roustam Gareyev, Alessandro Abbotto, James A. Krom, and Kathleen V. Kilway Extended lithium ion pair indicator scale in tetrahydrofuran Antonio Marques, Massimo di Matteo, and Marie-Francoise Ruasse Remarkable efficiency of iron(II) versus manganese(III) tetraphenylporphyrins as catalysts for fast and quantitative oxidation of sulfides into sulfones by hydrogen peroxide Ruslan M. Minyaev and Viadimir I. Minkin Theoretical study of O-—X (S, Se, Te) coordination in organic compounds Andrew P. Dicks, E. Li, Andrew P. Munro, Helen R. Swift, and D. Lyn H. Williams The reaction of S- nitrosothiols with thiols at high thiol concentration Per I. Arvidsson, Maria Hansson, Agha Zul-Qarnain Khan, and Per Ahlberg Solvent-induced stereospecific isomerization of an allylic alcohol to a homoallylic alcohol catalyzed by a chiral lithium amide George W. Kabalka, Su Yu, and Nan-Sheng Li Selective hydroboration of alkenes and alkynes in the presence of aldehydes and ketones Teresa B. Freedman, Diane L. Hausch, Steven J. Cianciosi, and John E. Baldwin Kinetics of thermal racemization of (25,3S)-1-!3C-1,2,3-d3-cyclopropane followed by vibrational circular dichroism spectroscopy Knut Rang, Jan Sandstrém, and Christer Svensson The conformational equilibrium of N,N ’-bis[(S)-1- phenylethyl]-thiourea and its solvent dependence, studied by NMR and CD spectra and by X-ray crystallography James E. Van Verth, William H. Saunders, Jr., and Thomas W. Kermis Identity-reaction proton transfers from nitrogen acids yielding localized vs. delocalized conjugate bases. An ab initio study Ariel Sella, Shmuel Cohen, and Shmaryahu Hoz__1,3-Diphenylsulphonylcyclobutane: an unprecedented case of a higher stability of the trans isomer of 1,3-disubstituted cyclobutane Ariel Sella, Harold Basch, and Shmaryahu Hoz Concerted motion in bicyclobutane Sung Soo Kim, Yu Zhu, In Seok Oh, and Chang Gyeong Lim_ Reactions of benzyl methyl substituted-benzy] phosphites with tert-butyl hypochlorite: "balanced TS" validating reactivity/selectivity principle Angela P. Lyon, Nicola J. Banton, and Donal H. Macartney Kinetics of the self-assembly of a-cyclodextrin [2]pseudorotaxanes with polymethylene threads bearing quaternary ammonium and phosphonium end groups Gennady V. Shustov and Michael T.H. Liu On the possibility of conversion of strained bridgehead alkenes into carbenes via 1,2 hydrogen and 1,2 carbon migrations. A theoretical study of the rearrangements in the adamantene and protoadamantene systems John K. Conner, Johanna Haider, M.N. Stuart Hill, Howard Maskill, and Monique Pestman The mechanism of solvolysis of 2-adamantyl azoxytosylate: isotopic labelling, medium effect, and attempted deoxygenation studies Alfredo Mayall Simas, Joseph Miller, and Petrénio Filgueiras de Athayde Filho Are mesoionic compounds aromatic? Michael T. Annandale, Gary W. vanLoon, and Erwin Buncel Regioselectivity and stereoelectronic effects in the reactions of the dinitroaniline herbicides trifluralin and benefin with nucleophiles Yuehui Zhou, W.E. Baker, P.M. Kazmaier, and E. Buncel Phenanthroimidazole dimers: structure and free radical reactivity; piezochromism, thermochromism, and photochromism Contents Robin A. Cox, Kap-Soo Cheon, Sam-Rok Keum, and Erwin Buncel Mechanism of the benzidine disproportionation of (arylhydrazo)pyridines. The reactions of 4-(4-chlorophenylazo)pyridine and -hydrazo)pyridine in acid media Jason A. Ardus, Ivan G. Gillman, and Richard A. Manderville On the role of copper and iron in DNA cleavage by ochratoxin A. Structure—activity relationships in metal binding and copper-mediated DNA cleavage Zhao Wang, W. David Chandler, and Donald G. Lee Mechanisms for the oxidation of secondary alcohols by dioxoruthenium(V1I) complexes J. Peter Guthrie, Allan R. Stein, and Anthony P. Huntington Thermodynamics of methanesulfonic acid, methanesulfony] chloride, and methyl methanesulfonate Francois Terrier, Marie-José Pouet, Khalid Gzouli, Jean-Claude Hallé, Francis Outurquin, and Claude Paulmier Carbon—carbon coupling of 4,6-dinitrobenzofuroxan with 3-aminothiophenes: a kinetic and structural study Clifford A. Bunton, Houshang J. Foroudian, Nicholas D. Gillitt, and Christy R. Whiddon Dephosphorylation and aromatic nucleophilic substitution in nonionic micelles. The importance of substrate location Nikolai S. Zefirov and Alexandre N. Zakharov Catalysis by topologically anchored metal complexes. Liquid- phase hydroxylation of benzene by H,O, in the presence of zeolite-supported Fe(II) phthalocyanine Eduardo Humeres, Luiz Fernando Sequinel, Mauricéa Nunes, Célia M.S. Oliveira, and Patrick J. Barrie Kinetic effects induced by cellulose on water-catalyzed reactions. Hydrolysis of 2,4- dinitrophenyl cellulose xanthate and some sugar xanthate ester analogues Maria Cervera and Jordi Marquet Effects of superoxide anion generated from aromatic radical anions produced in nucleophilic aromatic photosubstitution reactions COMMUNICATION Galina A. Artamkina, Petr K. Sazonov, Vasily A. Ivushkin, and Irina P. Beletskaya Formation of cis- [R¢#CO)Re(CO),HaljNa complexes as an evidence of halogen—metal exchange between [Re(CO);]Na and polyfluorinated aryl and vinyl halides Author Index / Index des auteurs July / Juillet ARTICLES R.F.W. Bader 1997 Polanyi Award Lecture: Why are there atoms in chemistry? Takehiko Yamato, Mitsuteru Haraguchi, Jun-Ichi Nishikawa, Seiji Ide, and Hirohisa Tsuzuki Synthesis, conformational studies, and inclusion properties of tris[(2-pyridylmethy]l)oxy ]hexahomotrioxacalix[3]arenes Takehiko Yamato, Hideo Kamimura, and Hirohisa Tsuzuki _ipso-Nitration of tert-butyl[n.2]metacyclophanes; through-space electronic interactions between two benzene rings R.H. Abu-Eittah, M. El-Esawy, N. Ghoneim, and A.T. Aly A comparative theoretical study of the electronic structure of some nickel(II) azides, thiocyanates, and isothiocyanates T.M. Fyles, D. Loock, and X. Zhou Ion channels based on bis-macrocyclic bolaamphiphiles: effects of hydrophobic substitutions Silvia Alvarez-Santos, Angels Gonzalez-Lafont, and José M. Lluch Effect of the hydrogen bond network in carbonic anhydrase II zinc binding site. A theoretical study Elena Cerrada and Mariano Laguna _Heteroleptic gold complexes with 4,5-diselenolate-1,3-dithiole-2-thione (C;S3Se,*, dsit) Ayman Wahba Erian, Ebtisam Abdul Aziz Hafez, Elham Sayed Darwish, and Mohamed Hilmy Elnagdi Studies with polyfunctionally substituted heteroaromatics: synthesis of new heterocyclic aromatic amines as potential intermediates for preparation of dyes for thermal diffusion printing D.A. Block, D. Yu, D.A. Armstrong, and A. Rauk On the influence of secondary structure on the a-C—H bond dissociation energy of proline residues in proteins: a theoretical study C-8 Can. J. Chem. Vol. 76, 1998 Scott Brownridge, T. Stanley Cameron, Jack Passmore, Gabriele Schatte, and George W. Sutherland The 1050 preparation, X-ray crystal structure, and spectroscopic characterization of pentafluoropheny!- bis(pentafluorophenylthio)sulfonium hexafluoroarsenate, [(C¢F5S).SC¢F5][AsF¢] Craig D. Montgomery, Steven J. Rettig, and Bryn Shurmer Crystal structure of the spirophosphorane (OCMe,C(O)O),PH X.-Z. Zhang, R.C. Francis, D.B. Dutton, and R.T. Hill Decomposition of peracetic acid catalyzed by cobalt(II) and vanadium(V) Andrew G.H. Wee and Fuxing Tang Highly diastereoselective synthesis of 1,2-amino alcohols via nucleophilic addition of organocerium reagents to 4- and 5-oxazolidinonecarbaldehydes Wolfgang Kliegel, Jorg Metge, Steven J. Rettig, and James Trotter C-(2-Hydroxyaryl)-N-(2- hydroxyphenylmethy])nitrones as regioselective bidentate ligands in boron chelate formation. Crystal and molecular structures of a diphenylboron complex and its parent ligand Tristram Chivers, Masood Parvez, Ignacio Vargas-Baca, and Gabriele Schatte Conformational isomers of 1,2,5,6-tetrathiocins and the photoisomerization of a 1,2,5,6-tetrathiocin into a 1,2,3,6-tetrathiocin: X-ray structures r of (CgX482)2 (X = F, Cl) and C,F,SSSC,F,S Hui-Zhong Kou, Dai-Zheng Liao, Peng Cheng, Zong-Hui Jiang, Shi-Ping Yan, Geng-Lin Wang, Xin-Kan Yao, and Hong-Gen Wang _A new one-dimensional thiocyanato-bridged bimetallic compound [Cu(en)»Mn(NCS),(HO),],,. Synthesis, crystal structure, and magnetic properties ADDITIONS AND CORRECTIONS / AJOUTS ET CORRECTIONS Ariel Sella, Shmuel Cohen, and Shmaryahu Hoz Additions and corrections: 1,3-Diphenylsulphonylcyclobutane: an unprecedented case of a higher stability of the trans isomer of 1,3-disubstituted cyclobutane Author Index / Index des auteurs August / Aoat ARTICLES France-Isabelle Auzanneau, Mette Knak Christensen, Shannon L. Harris, Morten Meldal, and B. Mario Pinto Synthesis and characterization of polyethylene glycol polyacrylamide copolymer (PEGA) resins containing carbohydrate ligands. Evaluation as supports for affinity chromatography Colin W. Clarke and David N. Glew Aqueous nonelectrolyte solutions. Part XV. The deuterium sulfide — deuterium oxide system and the deuterium sulfide p-hydrate Alan Storr, David A. Summers, and Robert C. Thompson Transition metal azolates from metallocenes. Part 3: Polymeric manganese(II) and nickel(II) pyrazolates; synthesis, characterization, and magnetochemistry Alwin Cunje, Christopher F. Rodriquez, Diethard K. Bohme, and Alan C. Hopkinson Noble gas catalysed 1,2- migrations in NjH* and N,CH;+* Peter D. Wentzell, Ji-Hong Wang, Leon F. Loucks, and Kelli M. Miller Direct optimization of self-modeling curve resolution: application to the kinetics of the permanganate — oxalic acid reaction S.S. Abd El Rehim, Magdy A.M. Ibrahim, Hamdy H. Hassan, and Mohammed A. Amin Electrochemical behaviour of silver in aqueous chromate solutions Nick H. Werstiuk, Heidi M. Muchall, Jiagong Ma, and Michael T.H. Liu A study of the vacuum pyrolysis of para-substituted diazoacetophenones with He(I) ultraviolet photoelectron spectroscopy Ana M. Sanz, Pilar Navarro, Fernando Gomez-Contreras, Mercedes Pardo, Gérard Pépe, and André Samat A new diaza heteroaromatic crown of 3,5-disubstituted 1H-pyrazole which forms solid dinuclear complexes with lipophilic phenethylamines Giancarlo Verardo, Nicoletta Toniutti, and Angelo G. Giumanini Preparation, properties, and reductive alkylation of arylhydrazides Rose-Marie Dheilly, Yahya Sebaibi, Joseph Tudo et Michéle Queneudec Importance de la présence de magnésie dans le stockage de la chaux : carbonatation de I’ oxyde et de I’hydroxyde de magnésium Joaquim C.G. Esteves da Silva, Adélio A.S.C. Machado, Miguel A. Ferreira, and Francisco Rey Method for the differentiation of leaf litter extracts and study of their interaction with Cu(II) by molecular fluorescence Contents Stéphane Duvivier, Mireille Turmine et Pierre Letellier Solubilité de la B-cyclodextrine dans les mélanges eau — nitrate d’éthylammonium a 25°C Arezki Boudif, Sandrine Gimenez, Bernard Loock, and Michel Momenteau _ vic-Diacrylic ester porphyrins as starting materials for monobenzoporphyrin and opp-dibenzoporphyrin syntheses Scott Brownridge, Jack Passmore, and Xiaoping Sun The electrophilic substitution reaction of the dithionitronium cation [SNS]* with benzene Author Index / Index des auteurs September / Septembre ARTICLES Robert B. Grossman and Robert J. Trupp The first reagent-controlled asymmetric halolactonizations. Dihydroquinidine—halogen complexes as chiral sources of positive halogen ion Donald R. Arnold and Kimberly A. McManus Photochemical nucleophile—olefin combination, aromatic substitution (photo-NOCAS) reaction: methanol, 8-myrcene, and 1,4-dicyanobenzene. Intramolecular cyclization of an ene—diene radical cation Katrin Kohler and Warren E. Piers Ketone coordination chemistry of the diborane t-BuCH=C[B(C,F;)>]> Paul Harrington and Michael A. Kerr The ultra high pressure conjugate addition of indoles to electron-deficient olefins Gregory D. Boucher, Aaron C. MacDonald, Brent E. Hawrylak, and D. Gerrard Marangoni A nuclear magnetic resonance investigation of the micellar properties of two-headed surfactant systems: the disodium 4-alkyl- 3-sulfonatosuccinates. 1. Equilibrium micellar properties Lubomir RuliSek, Zdenék Havlas, Stanislav Hetmanek, and Jaromir PleSek Regular polyhedral molecules. P29 and its inclusion compounds Jordan H. Wosnick, Frederick G. Morin, and Denis F.R. Gilson +*'!P chemical shift anisotropies of trimethyl- and triphenylphosphine-substituted Group 6 metal peniacarbonyl complexes E.A. Jefferson, A.J. Kresge, L. Matthew, and Z. Wu_ Ketonization of (Z)-2-methoxy-1,2-diphenylvinyl alcohol. Quantitative evaluation of the remarkable kinetic stability of this enol M. Parvez, A. Rauk, T.S. Sorensen, and F. Sun Structure reassignment of the major isomer from the Diels—Alder reaction of acryloyl chloride and 4,5,6,6a-tetrahydropentalene John T. Edward Calculation of octanol—water partition coefficients of organic solutes from their molecular volumes Yoshifumi Yuasa, Yoko Yuasa, and Haruki Tsuruta A practical and efficient enantioselective synthesis of (2S)- 3-(tert-butylsulfonyl)-2-benzylpropionic acid, a useful chiral building block for renin inhibitors Thomas E. Goodwin, Jennifer M. Meacham, and Mark E. Smith Observations on the stereochemistry of reduction of 2,6-dimethylcyclohexanones Carmen E. Hernandez and William E. Acree, Jr. Solubility of fluoranthene in organic nonelectrolyte solvents. Comparison of observed versus predicted values based upon Mobile Order theory J. Stephen Hartman, Elizabeth I. IInicki, James A. W. Shoemaker, Wojciech R. Szerminski, and Zheng Yuan Formation of mixed-ligand fluoroboron cations involving C=N donors. A !9F and ''B NMR study Author Index / Index des auteurs October / Octobre ARTICLES Robert A. McClelland, Timothy A. Gadosy, and Daniel Ren 1997 Alfred Bader Award Lecture: Reactivities of arylnitrenium ions with guanine derivatives and other nucleophiles Viviana L. Ponzo and Teodoro S. Kaufman __Diastereoselective alkoxymethylation of aromatic aldehydes with chiral lithiomethy! ethers. Synthesis of optically active monoprotected glycols C-10 Can. J. Chem. Vol. 76, 1998 Agnes M. Modro, Tom A. Modro, Malose J. Mphahlele, Wieslawa Perlikowska, André Pienaar, Marcelo Sales, 1344 and Petrus H. van Rooyen Reaction of carbanions generated from arylmethylphosphonates with cyclic enones. Regio- and stereoselectivity of addition Herbert Hépfl, Mario Sanchez, Norberto Farfan, and Victor Barba Synthesis and comparative study of three monomeric boronates by spectroscopic methods and X-ray crystallography Ellie L. Uzunova, Dimitar G. Klissurski, and Stella D. Nemska Surface studies of nano-dimensional particle size iron—manganese spinel mixed oxides Ralph M. Paroli, Denis F.R. Gilson, and Ian S. Butler Spectroscopic and differential scanning calorimetric studies of the phase transitions in oxanorbornane Michael Lewis, Charles L. Barnes, and Rainer Glaser The supramolecular architecture of 4-aminoacetophenone (1-(4-fluorophenyl)ethylidene)hydrazone hydrate. Double T-contacts and extremely low-density water layers in a mixed azine Ian R. Baird, Steven J. Rettig, Brian R. James, and Kirsten A. Skov Synthesis and characterization of homoleptic ruthenium(II) imidazole complexes, and a carbonyl] species derived by CO abstraction from DMF Igor L. Shamovsky, Gregory M. Ross, Richard J. Riopelle, and Donald F. Weaver Molecular modelling studies of a nerve growth factor receptor Gustavo A. Arteca and Denise I. Caughill Temperature dependence of self-entanglements in protein backbones near the glass-like transition Laurence J. Beach, Raymond J. Batchelor, Frederick W.B. Einstein, and Andrew J. Bennet General base- catalyzed hydrolysis and carbonyl-!8O exchange of N-(4-nitrobenzoyl)pyrrole Juan Antonio Gonzalez, I. Garcia de la Fuente, and J.C. Cobos DISQUAC structure-dependent interaction parameters for mixtures containing sec-alkanols and benzene, toluene, or n-alkanones Harry W. Gibson, Devdatt S. Nagvekar, Yadollah Delaviz, and William S. Bryant Synthesis of a new class of difunctional tetraphenylene crown ethers John M. Goodings and QingFeng Chen Chemical kinetics and thermodynamics of tin ionization in H,-O,-N, flames and the proton affinity of SnO Christopher J.A. Daley, Jason A. Wiles, and Steven H. Bergens Application of jRu((R)-BINAP)(MeCN)(1-3:5,6- 1-CsH,,)](BF4) as a catalyst precursor for enantioselective hydrogenations Luigi Cavallo, Tom K. Woo, and Tom Ziegler A combined QM/MM study of ligand substitution enthalpies in the L,Fe(CO)3, RuCpL,Cl, and RuCp*L,Cl systems Veranja Karunaratne and David Dolphin Oxidation of 2-methylpyrroles with perchlorinated iron(II) metalloporphyrin catalysts: a versatile synthesis of symmetric and asymmetric dipyrromethanes P.F. McGarry and J.C. Scaiano The absolute kinetics for radical addition and electronic energy transfer to [1.1.1 ]propellane Author Index / Index des auteurs November / Novembre Materials Science Special Issue Numéro spécial sur la science des matériaux ARTICLES Sonia Moffatt, Abdellah Ajji, Bernard Lotz, and Josée Brisson Uniaxial deformation of nylon-6 and nylon-11: changes in orientation and crystal phase Michel Lafleur Phase behaviour of model stratum corneum lipid mixtures: an infrared spectroscopy investigation Boyan B. Bonev and Michael R. Morrow 7H NMR studies of dipalmitoylphosphatidylcholine and dipalmitoylphosphatidylcholine—cholesterol bilayers at high pressure Jennifer F. Caplan, Christopher A. Murphy, Susan Swansburg, Robert P. Lemieux, T. Stanley Cameron, and Manuel A.S. Aquino Evidence for room temperature mesomorphism in a mixed-valent diruthenium(II, II} quintapalmitoleate polymer Jimmy Lowe, Car! Bartels, and Steven Holdcroft Synthesis and properties of a sterically encumbered poly(thienylene vinylene): poly[E-1,2-(4,4’-dihexyl-2,2’-dithienyl)ethylene]