Cumulative Author Index 1994 Afanasiev, P., 193 Alfimov, M. V., 109 Ebitani, K., 377 Elisei, F., 279 Kalugin, 0.N., 297 Katsumura, Y., 93 Neoh, K. G., 355 Nerukh, D. A., 297 Salmon, G. A., 75 Sbriziolo, C., 31 1 Al-Ghefaili, K. M., 383 Eustaquio-Rincon, R., 113 Kawashima, T., 127 Nicholson, D., 181 Schnabel, W., 287 Allegrini, P., 333 Allen, N. S., 83 Favaro, G., 279,333 Filimonov, I. N., 219, 227 Kida, I., 103 Kim, J-H., 377 Ninomiya, J., 103 Nishihara, H., 321 Shaw, N., 17 Sheil, M. M., 239 Aramaki, K., 321 Avila, V., 69 Baba,T., 187 Bassoli, M., 363 Fogden, A., 263 Fornes, V., 2 13 Frey, J. G., 17 Gans, P., 315 King, F., 203 Klein, M. L., 253 Kondo, Y ., 121 Kuwamoto, T., 121 Nonaka, O., 121 Nyholm, L., 149 Occhiuzzi, M., 207 Ohtsu, K., 127 Shiralkar, V.P., 387 Silva, C. J., 143 Silva, F., 143 Soria, V., 339 Bell, A. J., 17 Bendig, J., 287 Garcia, R., 339 Geantet, C., 193 Langan, J. R., 75 Leaist, D. G., 133 Oliveri, G., 363 Ono, Y., 187 Sun, L. M., 369 Surov, Y. N., 297 Bickelhaupt, F., 327 Gill, J. B., 315 Lei, G-D., 233 Oradd, G., 305 Tabrizchi, M., 17 Boggis, S. A., 17 Borisenko, V. N., 109 Goede, S. J., 327 Gomez, C. M., 339 Lerner, B. A., 233 Li, J., 39 Ortica, F., 279 Ota, K-i., 155 Takagi, T., 121 Takahashi, K., 155 Bradley, C. D., 239 Breysse, M., 193 Gray, P. G., 369 Green, W. A., 83 Lin, J., 355 Lindblom, G., 305 Otlejkina, E. G., 297 Ottavi, G., 333 Tanaka, I., 349 Teo, W. K., 355 Brocklehurst, B., 271 Grimshaw, J., 75 Liu,C-W., 39 Ozutsumi, K., 127 Teraoka, Y., 349 Brown, R.G., 59 Haeberlein, M., 263 Liu, X., 249 Padley, M. B., 203 Timms, A. W., 83 Caldararu, H., 213 Camacho, J. J., 23 Campa, M. C., 207 Hall, G., 1 Hallbrucker, A., 293 Handa, H., 187 Loginov, A. Yu., 219,227 Longdon, P. J., 315 Lu, J-X., 39 Paradisi, C., 137 Pardo,A., 23 Parsons, B. J., 83 Trejo, A., 113 Turco Liveri, M. L., 311 Turco Liveri, V., 311 Campos, A., 339 Hao, L., 133 Lunelli, B., 137 Pedulli, G. F., 137 Vedrine, J. C., 193 Caragheorgheopol, A., 213 Carvill, B. T., 233 Harrison, N. J., 55 Helmer, M., 31 Mahy, J. W. G., 327 Makarova, M. A., 383 Pereira, C. M., 143 Peter, L. M., 149 Villamagna, F., 47 Villemin, D., 97 Catalina, F., 83 Hosoi, K., 349 Malatesta, V., 333 Petrov, N. Kh., 109 Vlietstra, E.J., 327 Cavasino, F. P., 311 Hutchings, G. J., 203 Mallon, D., 83 Pivnenko, N. S., 297 Vollmer, F., 59 Cheng, A., 253 Hutton, R. S., 345 Mandal, A. B., 161 Plane, J. M. C., 31 Vyunnik, I. N., 297 Cherqaoui, D., 97 Ikawa, S-i., 103 Martins, A., 143 Porcar, I., 339 Whitaker, 9. J., 1 Chesta, C. A., 69 Ikonnikov, I. A., 219 Masetti, F., 333 Potter, C. A. S., 59 Whitehead, M. A., 47 Cho,T., 103 Cordischi, D., 207 Indovina, V., 207 Ishigure, K., 93 MatijeviC, E., 167 Matsuda, J., 321 Poyato, J. M. L., 23 Previtali, C. M., 69 Wikander, G., 305 Williams, D. E., 345 Corma, A., 213 Iwasaki, K., 121 Mazzucato, U., 333 Rettig, W., 59 Wilpert, A., 287 Corrales, T., 83 Jayakumar, R., 161 Meunier, F., 369 Rey,F., 213 Yagci, Y., 287 Cosa, J. J., 69 Jenneskens, L.W., 327 Moriguichi, I., 349 Richter, R., 17 Yoshitake, H., 155 Coudurier, G., 193 Curtis, J. M., 239 Derrick, P. J., 239 Dickinson, E., 173 Dwyer, J., 383 Dyke, J. M., 17 Jennings, 9. J., 55 Jiang, P. Y., 93 Johansson, L. B-A., 305 Joseph, E. M., 387 Joshi, P. N., 387 Kagawa, S., 349 Morikawa, A., 377 Morokuma, M., 377 Nagaishi, R., 93 Nagaoka, H., 349 Navaratnam, S., 83 Rocha, M., 143 Rochester, C. H., 203 Rofia, S., 137 Rossi, P. F., 363 Ryde,N., 167 Sachtler, W. M. H., 233 Yotsuyanagi, T., 93 Young, R. N., 271 Zholobenko, V. L., 233 Zhong, G. M., 369 The following papers were accepted for publication between 1st and 30th November, 1993: Limiting partial molar volumes of electrolytes in dimethylformamide-water mixtures at 298.15 K A.Maestre, E.Garcia-Paiieda, C. Yanes and J. J. Calvente Photocatalytic decomposition of dinitrogen oxide on Cu-containing ZSM-5 catalyst A. Morikawa, K. Ebitani, M. Morokuma and J-H. Kim Infrared studies of cerium dioxide: Influence of impurities and defects F. Bozon-Verduraz and A. Bensalem Bilayer phases in aqueous mixtures of dodecylpentaoxyethylene glycol monoether (C,2E5) and sodium decyl sulfonate (C,,SO,Na) C. B. Douglas and E. W. Kaler Effect of preferential solvation on reactivity of a free radical in binary solvent mixtures 0. It0 and H. Watanabe Formation of oxygenates of C, on rhodium-containing catalysts during CO + H, reactions. An FTIR study of acetaldehyde adsorption J-P. Hindermann, D.Demri, C. Diagne and A. Kiennemann Laser flash photolysis studies on hydrogen-atom transfer from the triplet hydroxynaphthylammonium ion to benzophenone via a triplet exciplex. Which group is more reactive for hydrogen atom transfer, -OH or -NH+,? H. Shizuka, M. Yamaji and K-I. Tamura Al-Pillared saponites. Part 1.-IR studies J-F. Lambert, S. Chevalier, R. Franck, H. Suquet and D. Bart homeuf Al-Pillared saponites. Part 2.-NMR studies J-F. Lambert, S. Chevalier, R. Franck, H. Suquet and D. Barthomeuf Kinetics of thermal decomposition of the diazines: Shock tube pyrolysis of pyrimidine J.C. Mackie and A. Doughty Computer modelling of phosphate biominerals: Transfer of parameters for interatomic potentials for different polymorphs of divalent metal diphosphates M.G. Taylor, K. Simkiss and M. Leslie Reaction of molecular oxygen with C6,: Spectroscopic studies A. M. Bradshaw, H. Werner, Th. Schedel- Niedrig, D. Herein, M. Keil, B. Henog and R.Schlog Voltammetric and SNIFTIRS study of the adsorption and oxidation of L(+)-ascorbic acid on Pt electrodes in acid medium. Effect of Bi adatoms A. Aldaz, M.A. Climent, A. Rodes, M.J. Valls, J.M. Perez and J.M. Feliu Synthesis, structures and electrical properties of the charge-transfer salts of 4,5-ethylenedithio-4’-5’-(2-oxatrimethy1enedithio)diselenadithiafulvalene (EOST) with linear anions (I3-, lBr,-, ICl;, 12Br-, AuBr;, Au(CN),) T. Naito, A. Tateno, T. Udagawa, H. Kobayashi, R.Kato, A. Kobayashi and T. Nogami Pulse radiolytic one-electron reduction of 2-hydroxy- and 2,6-dihydroxy-9,1O-anthraquinones H.Pal, T. Mukherjee and J. P. Mittal Characterization of transients formed in aqueous solutions of substituted alkyl sulfides: A pulse radiolysis study J. P. Mittal, D. K. Maity and H. Mohan U1 trasonic velocities and isentropic compressibilities of some tetraalkylammonium and copper(1) salts in acetonitrile and benzonitrile D. S. Gil, J. Singh, T. Kaur and V. Ali Transport and compressibility studies of some copper(1) perchlorates in binary mixtures of benzonitrile and acetonitrile D. S. Gill, R. Singh, V. Ali, J. Singh and S. K. Rehani Primary yields of water radiolysis in concentrated nitric acid solutions Y. Katsumura, R.Nagaishi, P-Y. Jiang and K. Ishigure Oxygen exchange between magnesium oxide surface and carbon dioxide H.Hattori, H. Tsuji, T. Shishido, A. Okamura, Y. Gao and H. Kita Response kinetics of polymer coated bulk acoustic wave devices on exposure to gases and vapours N. J. Freeman, I. P. May and D. J. Weir Photocatalysts with tunnel structures for decomposition of water. Part l.-BaTi,O, having a pentagonal prism tunnel structure and its combination with various promoters Y.Inoue, Y. Asai and K. Sat0 Study of the hydrogen reduction of cerias with different textures and their reoxidation by oxygen V. IPerrichon, A. Laachir, 0. Touret, G. Bergeret, R.Frety and L. Tournayan 11 Theoretical and experimental study of the flow of condensed molecular monolayers on a Langmuir trough J. G. Byatt-Smith and B.R. Malcolm Water-induced structural changes within the L, phase of DDAB-cyclohexane-water systems J. Eastoe and R. K. Heenan Volumetric properties of steam-carbon dioxide mixtures derived from excess molar enthalpy measurements C. J. Wormald and M. Massucci Kinetic model for serum albumin adsorption: Experimental verification J. J. Ramsden, R. Kurrat and J. E. Prenosil Infrared and submillimetre-wave spectra of doped poly (p-phenylene vinylene) K. Davidson and S. El-Atawy Catalytic reactions of o-xylene and rn-xylene with deuterium on metal films C. Kemball and R. J. Harper Application of simple expressions for the high-pressure volumetric behaviour of liquid mesitylene V. G. Baonza, M. C. Alonso and J. N.Delgado Structures and vibrational spectra of CH,OCH,CH,OH: The hydrogen-bonded conformers J.J. C. Teixeira- Dias, F. P. S. C. Gil, A. M. Amorim da Costa and R. Fausto Theoretical potential-energy functions and the rovibronic spectrum of the SiH,+ ion D. M. Hirst, C. Bauer, D. I. Hall, P. J. Sarre and P. Rosmus Electrochemical study of the heterogeneously catalysed reaction between NJV-dimethyl-p-phenylenediamine and Co"'(NH,),C12+ at monometallic and bimetallic surfaces of silver and gold U.Nickel, Y-H. Chen and M. Spiro DRIFT and mass spectrometric experiments on the chemistry and the catalytic propeties of small Ir clusters at the surfaces of polycrystalline a-Al,O, L. Basini and A. Aragno Reactions of N(2 ,D) and N(2 2P) with 0, H. Umemoto, Y. Shihira, T. Suzuki, S-i. Unayama and S.Tsunashima Hydrogen evolution reaction on electrodes coated with conducting-polymer films K. Doblhofer and K. Maksymiuk Metallocyclodextrins of 6A-(3-aminopropylamino)-6A-deoxy-~-cyclodextrin:Their formation and enantioselective complexation of (R)-and (3-tryptophan anions in aqueous solution S. F. Lincoln, S. E. Brown, J. H. Coates and C. J. Easton Internal rotation in auramine 0 A. Harriman and P. Gautam Adsorption of binary mixtures of heptane and alkanols by activated carbon A. M. Gongalves da Silva, V. A. M. Soares and J. C. Calado NMR study of E-caprolactam in various solvents: Graphical determination of monomer shift, dimer shift and dimerization constant from the dilution shift data J-S. Chen Dual-cylinder microelectrodes. Part 2.-Steady-state generator and collector electrode currents B.J. Seddon, C. F. Wang, P. Li, W. Peng and X.Zhang Stability of thin polar films on non-wettable substrates A. Sharma and A. T. Jameel ... 111 FARADAY DIVISION INFORMAL AND GROUP MEETINGS Division Annual Congress: The Reactive Interface in Electrochemistry and Catalysis To be held at the University of Liverpool on 12-15 April 1994 Further information from Dr J. F. Gibson, The Royal Society of Chemistry, Burlington House, Piccadilly, London W1V OBN Neutron Scattering Group Neutron Scattering Data Analysis To be held at the Rutherford Appleton Laboratory on 13-15 April 1994 Further information from Mrs S. Humphreys, The Rutherford Appleton Laboratory, Chilton, Didcot 0x11 ORA Colloid and Inte@ace Science Group Theoretical Modelling and Simulation in Colloid and Interface Science To be held at the University of Bristol on 18-20 April 1994 Further information from Dr R.Buscall, ICI Corporate Science Group, PO Box 11, The Heath, Runcorn WA7 4QE Division Autumn Meeting: Reactions and Mechanisms for Fine Chemicals To be held at the University of Glasgow on 69 September 1994 Further information from Dr J. F. Gibson, The Royal Society of Chemistry, Burlington House, London W1V OBN Gas Kinetics Group 13th International Symposium on Gas Kinetics To be held at University College, Dublin on 11-15 September 1994 Further information from Dr H. Sidebottom, Department of Chemistry, University College, Dublin Electrochemistry Group with the SCI ELECTROCHEM 94 To be held in Edinburgh on 12-16 September 1994 Further information from Professor D.E. Williams, Department of Chemistry, University College London, 20 Gordon Street, London WC1H OAJ iv THE ROYAL SOCIETY OF CHEMISTRY, FARADAY DIVISION, GENERAL DISCUSSION 97 Structure and Dynamics of Van der Waals Complexes University of Durham, 6-8 April 1994 Organising Committee: Dr B. J. Howard (Chairman) Dr P. Hamilton Dr J. M. Hutson Dr D. C. Clary Professor A. C. Legon Dr B. Soep Dr P. R. R. Langridge-Smith Since Faraday Discussion No. 73 on Van der Waals molecules, in 1982, the study of weakly bound molecular complexes has developed rapidly. Spectroscopic studies can now yield detailed information on intermolecular potential-energy surfaces in molecular systems. Studies of trimers, tetramers and higher clusters are giving insight into solvation effects and providing information on many-body forces, which are important in understanding the properties of condensed phases.Investigations of photodissociation and predissociation processes are helping us to understand the dynamics of fundamental chemical processes such as molecular rearrangement and energy transfer. In addition, Van der Waals complexes provide an opportunity to control the orientation of colliding molecules and the energies and impact parameters of reactive collisions, and have added significantly to our understanding of the pathways of simple chemical reactions.This discussion will bring together experimentalists and theoreticians who are involved in the study of Van der Waals molecules. The final programme and application form may be obtained from Mrs Angela Fish, The Royal Society of Chemistry, Burlington House, Piccadilly, London W1V OBN. THE ROYAL SOCIETY OF CHEMISTRY, FARADAY DIVISION, GENERAL DISCUSSION 98 Polymers at Surfaces and Interfaces University of Bristol, 12-14 September 1994 Organising Committee: Professor Sir Sam Edwards (Chairman) Dr R. Buscall Professor R. H. Ottewill Dr T. Cosgrove Professor J. S. Higgins Dr R. W. Richards Dr R. A. L. Jones New experimental methods and new theoretical and computational techniques have recently led to great progress in understanding the difficult but technologically important problems associated with the conformation of polymer molecules at surfaces and interfaces.The purpose of this Discussion is to bring together experimentalists and theoreticians working towards a molecular understanding of polymers at surfaces and interactions to survey the progress in the area to date and to indicate future directions of research. The meeting will attempt to bring a unified approach to the problem, encompassing problems of the structure of surfaces and interfaces in polymer melts, the conformation of polymers at solifliquid and liquid/liquid interfaces, and extensions towards more complicated biological systems. The preliminary programme may be obtained from Mrs Angela Fish, The Royal Society of Chemistry, Burlington House, Piccadilly, London W1 V OBN.V THE ROYAL SOCIETY OF CHEMISTRY, FARADAY DIVISION, GENERAL DISCUSSION 99 Vibrational Optical Activity: from Fundamentals to Biological Applications University of Glasgow, 19-21 December 1994 Organising Committee Professor L. D. Barron (Chairman) Dr A. F. Drake Dr D. L. Andrews Professor R. E. Hester Professor A. D. Buckingham Traditional optical activity measurements such as CD are confined to the visible and near-ultraviolet spectral regions where they provide stereochemical information on chiral molecules via polarized electronic transitions. Thanks to prompting from theory and new developments in instrumentation, optical measurements are now being made in the vibrational spectrum using both infrared and Raman methods.Studies over the past decade on a large range of chiral molecules, from small organics to biological macromolecules, have demonstrated that vibrational optical activity opens up a whole new world of fundamental studies and practical applications undreamt of in the realm of conventional electronic optical activity. The meeting seeks to bring together experimentalists and theoreticians to discuss the current and future experimental possibilities and the development of theories, including ab initio computational methods, which can relate the observations to stereochemical details. The increasing importance now being attached to molecular chirality and solution conformation in the life sciences should also encourage the partipation of biomolecular scientists.The preliminary programme may be obtained from Mrs Angela Fish, The Royal Society of Chemistry, Burlington House, London W1V OBH. vi MENDELEEV COMMUNICATIONS Mendeleev Communications is a prestigious new primary journal, produced as a collaborative venture between The Russian Academy of Sciences and The Royal Society of Chemistry. It publishes original papers directly in English, giving the international chemical community rapid access to important new research from Russia and the other states of the former Soviet Union in the shortest possible time. The journal contains preliminary accounts of novel and significant results of wide general appeal or exceptional specialist interest and covers all branches of chemistry.In format and range of subject matter it closely resembles its 'sister' publication, the popular RSC journal Chemical Communications. A selection of recent papers:Transformation of Androsta4,9-diene-3,17-dione into 16a,l7a-Epoxycorticosterone Alevtina M. Turuta,include: Aleksei V. Kamernitskii, Ta t'yana M. Fadeeva and Luu Duc Huy* Primary publication in English of original A Novel Approach to Carbacycline Genrikh A. Tolstikov, Rinat R.Akhmetvaleev, Vadim M. Zhurbachemistry from Russia and other states of the and Mansur S. Miftakhov former USSR Oxidation of Alkanes by Dioxygen in the Presence of +-Two stages of rigorous refereeing -once in an Iron Complex immobilized on Modified Silica.Chemical Model of Methane Monooxygenase Moscow and once in the UK -to maintain the Vera S. Belova, Alexander M. Khenkin, Victor N. highest possible standards Editorial Boards in both Moscow and the UK Postnov, Valerii E. Prusakov, Alexander E. Shilov and Marina 1. Stepanova composed of eminent scientists who will Cyclic Oligophosphonic Anhydrides /van S. Alfer'ev advise on refereeing policy Rapid publication -and Sergey Yu. Bobkov appearance of papers Cyclopropanation of Unsaturated Compounds with Diazomethane Generated in situ: A New Efficient within 12 weeks of receipt in the UK and Practical Route to Cyclopropane Derivatives Oleg M. Nefedov, Yurii V. Tomilov, Andrei 8. * High quality production and editing Kostitsyn, Usein M.Dzhemilev and Vladimir A. * News section containing details of Ookitchev forthcoming international conferences and Direct Evidence for Bidentate Character of Potentially information about The Russian Academy of Tridentate N,S-Ligands. Molecular Structures of Bis~N-(2-pyridyl)thiosalicylidene-~S-amino-~~-Sciences nickel(it) and Bis ( 1-isopropyl-3-methyl4-[N-(2-* Essential reading to keep up-to-date with pyridyl)imino-~N-methyl]pyrazole-5-thiolato-~S}-copper(ii) Alexander E. Mistryukov, @or5. current chemical research Mendeleev Communications is NOT a Vasil'chenko, Vladimir 5.Sergienko, Alexander 1. Nivorozhkin, Stanislav G. Kochin, Mikhail A. Porai-Koshits, Leonid E. Nivorozhkin and Alexander 0.translation journal Garnovs kii ROYAL Position Organisation Address Inlormation Srrvlc es Please return to: Sales and Promotion Department, Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge CB4 4WF, United Kingdom.Tel: + 44(0)223 420066 Fax: + 44(0)223 423623 Telex: 818293 ROYAL. vii Take a look at the following contents page of a recent issue and discover what you have been missing: Volume 21 Issue I Pages 1-84 March 1992 Chemistry of Potentially Prebiological Natural Products By Alben €schenmoser and Eli Loewenrhal (pp.l-16) The demonstration that biologically relevant molecules can be generated non-enzymicully from precursors as simple as hydrogen cyanide, and found in interstellar space, identifies possible pathways for the molecular mechanisms of the origin of life.The reason why Nature uses pentoses in nucleic acids and not hexoses can be understood by comparing the properties of 'homo-DNA' oligonucleotides derived from e.g. 2',3'-dideoxyallose with those of DNA oligonucleotides from deoxyribose. The Theory of Atomic and Molecular Collisions By John N. Murrell and S. Danko Bosanac (pp.17-28) The inter atom/molecule potential governs molecular behaviour over a vast range from physical properties in bulk phase to intrinsic chemical reactivity. Scattering data from collisions in crossed beam experiments provide the most important probes of such potentials. The classical, semiclassical, and quantum mechanical theories available to analyse the data from elastic, inelastic, and reactive scattering processes are reviewed.Cyclopentadienyl Molybdenum and Tungsten Dihalides By Malcolm L. H. Green and Philip Mounfford (pp.29-38) Two alternative structures observed for binuclear cyclopentadienyl molybdenum or tungsten dihalides. one with a metal-metal single bond, the other with a triple bond, illustrate 'a delicate balanct between mctal-metal and metal-ligand bonding'. The 'rich and diverse reaction chemistry' of these complexes is illustrated with referena to the structural tjpe and nature of the halide. Lariat Ethers: From Simple Sidearms to Supramolecular Systems By George W. Gokel (PP.3947) This review constitutes a highly personal account by Professor Gokel of crown ethers having side-arms -or lariat ethers, as the author has imaginatively dubbed them.He describes how the first systems. built up of single arms containing donor groups, have evolved into much more extensive molecukr arrays capable of exhibiting self-assembly at a supramolecular level under appropriate conditions. LUDWIG MOND LECTURE. Taking Stock: The Astonishing Development of Boron Hydride Cluster Chemistry By Norman N. Greenwood (pp.49-57) In his review lecture, Professor Greenwood highlights the two major intellectual puzzles and challenges of polyhedral borane chemistry -he traces the mechanisms and reactions by which boron hydride clusters interconvert and grow by reference to the gas-phase thermolysis of B,H,, B,H,,, B,H, ,,and B,H,, and he outlines how the simple idea that one, two, or even more metal centres might be incorporated as 'honoraryboron atoms' into the polyhedral clusters turned out to be extremely fruitful in the field of borane cluster chemistry.The VSEPR Model Revisited By Ronald J. Gillespie (pp.5949) The simplest and most powerful qualitative approach to the description and prediction of molecular geometries is VSEPR (Valence Shell Electron Pair Repulsion) Theory. Since it was proposed some thirty years ago the original ideas have been reformulated, a deeper understanding of the physical basis has been developed and its range of applicability has been extended. The theory IShere summarized in the light afthese refinements. The Nature of the Hydrogen Bond to Water in the Gas Phase By A.C.Legon and D. J. Millen (pp.71-78) The most fascinating and important weak intermolecular interaction is the hydrogen bond in water. It holds the key to the idiosyncratic behavrour of liquid water and dominates the chemistry of living systems. Recent advances in high resolution spectroscopy in the gas phase have enabled the intrinsic properties of this bond to be obtained by detailed study of a range of water-containing dimers (H,O.HX).The results of such studies are assessed and, in particular, questions relating to the proton donor/acceptor behaviour of water are discussed as are the factors governing dimer structure and the tendency for water to form protonated complexes. The Structure and Mechanism of Formation of Ozonides By Roben L.Kuczkowski (pp.79-83) This review article cxplores several questions of current interest surrounding the three key steps in the Criegee mechanism which involves a primary ozonide -or so-called molozonide -and a carbonyl oxide as intermediates. The question of whether the cycloadditions and the cycloreversion involving these elusivc intermediates are concerted mechanisms is addressed by Professor Kuczkowski with varying degrees of confidence by reference to the results obtained using physical organic techniques. including spectroscopy. kinetic isotope effects. and theoretical approaches. 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