ISSN 0956-5000 JCFTEV(21) 3205-3375 (1 994) JOURNAL OF THE CHEMICAL SOCIETY Faraday Transactions Physical Chemistry & Chemical Physics CONTENTS 3205 Non-reactive interaction of ammonia and molecular chlorine : Rotational spectrum of the ‘charge-transfer ’ complex H,N. -C1, A. C. Legon, D. G. Lister and J. C. Thorn 3213 Gas-phase IR spectrum of 7-azaindole. Scaled quantum mechanical force field and complete spectrum assignment E. Cane, P.Palmieri, R. Tarroni and A. Trombetti 3221 Low-temperature kinetics of reactions between neutral free radicals. Rate constants for the reactions of OH radicals with N atoms (103 d T/K < 294) and with 0 atoms (158 < T/K d 294) I. W. M. Smith and D. W. A. Stewart 3229 Interaction potentials and fragmentation dynamics of the Nee -.Br2 complex in the ground and electronically excited states A.A. Buchachenko, A. Yu. Baisogolov and N. F. Stepanov 3237 Theoretical vibrational energies of [Cr0,12-, [Mn0J2-and [FeO,]’- R. J. Deeth and P. D. Sheen 3241 Theoretical study of the electroreduction of halogenated aromatic compounds. Part 3.-0-, rn-and p-dibromobenzenes studied by AM1 and PM3 methods R. Andreoli, G. Battistuzzi Gavioli, M. Borsari and C. Fontanesi 3245 New approach to sensitivity analysis of multiple equilibria in solutions I. Fishtik, I. Nagypal and I. Gutman 3253 Effect of complexation on the excited state of uranyl /3-diketonato complexes: Application of the energy gap law T. Yamamura, S. Iwata, S-i. Iwamaru and H. Tomiyasu 3261 EPR study of NaCl :C0,-and NaCl :SO2-P.D. Moens, S. E.Van Doorslaer, F. J. Callens, F. R. Mae, P. F. Matthys and J. M. D’heer 3267 Time-resolved EPR study of spin polarization and dynamics of F+ centres in additively coloured CaO crystals C. Corvaja, L. Franco, L. Pasimeni and A. Toffoletti 3273 EPR, ENDOR and TRIPLE resonance characterization of three paramagnetic redox stages of 5-methyl-5H-diben-zo[a,LJcycloheptene M. L. T. M. B. Franco and M. C. R. L. R.Lazana 328 1 Mean activity coefficients of NaCl in glucose-water and sucrose-water mixtures at 298.15 K J. Wang, W. Liu, J. Fan and J. Lu 3287 Preferential solvation in acetonitrile-water mixtures. Relationship between solvatochromic parameters and standard pH values J. Barb and V. Sanz-Nebot 3293 Effect of solvent on the reaction of coordination complexes.Part 19.-Base hydrolysis of (a/?S)-(o-methoxybenzoato)-(tetraethylenepentamine)cobalt(m)in aquo-organic solvent media A. N. Acharya and A. C. Dash 3301 Thermodynamics and kinetics of the reaction of copper@) and iron(m) with ultra-small colloidal chalcopyrite (CuFeS,) E. Silvester, F. Grieser, T. W. Healy, D. Meisel and J. C. Sullivan 3309 Reaction of peroxomonosulfate radical with manganese@) in acidic aqueous solution. A pulse radiolysis study J. Berglund, L. I. Elding, G. V. Buxton, S.McGowan and G. A. Salmon 3315 Time-resolved microwave conductivity. Part 1.-TiO, photoreactivity and size quantization S. T. Martin, H. Herrmann, W. Choi and M. R.Hoffmann 3323 Time-resolved microwave conductivity.Part 2.-Quantum-sized TiO, and the effect of adsorbates and light intensity on charge-carrier dynamics S. T. Martin, H. Herrmann and M. R. Hoffmann 3331 X-Ray investigations on liquid-crystalline copolysiloxanes for second-harmonic generation E.Wischerhoff, R. Zentel and H. Fischer 3335 Thermal behaviour and physico-chemical characterization of synthetic and natural iron hydroxyphosphates D. Rouzies, 3. Varloud and J. M. M. Millet 3341 Applications of EPR to a study of the hydrogenation of ethene and benzene over a supported Pd catalyst: Deection of free radicals on a catalyst surface A. F. Carley, H. A. Edwards, B. Mile, M. W. Roberts, C.C. Rowlands, F. E. Hancock and S. D. Jackson 3347 FTIR studies on the selective oxidation and combustion of light hydrocarbons at metal oxide surfaces.Propane and propene oxidation on MgCr,O, E. Finocchio, G. Bum, V. Lorenzelli and R. J. Willey 3357 Oxidative coupling of methane over La,O,. Influence of catalyst preparation on surface properties and steady and oscillating reaction behaviour V. R. Choudhary and V. H. Rane 3367 Comparative IR spectroscopic study of low-temperature H, and CO adsorption on Na zeolites S. Bordiga, E. Garrone, C. Lambed, A. Zecchina, C. 0.Arean, V. B. Kazansky and L. M. Kustov 3373 Book reviews: R. Parsons, M. C. Ball, G. Duxbury, J. C. Whitehead, V. E. Steiner, R. T. Bailey Note: Where an asterisk appears against the name of one or more of the authors, it is included with the authors’ approval to indicate that correspondence may be addressed to this person. COPIES OF CITED ARTICLES The Royal Society of Chemistry Library can usually supply copies of cited articles. 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