FARADAY SYMPOSIA OF THE ROYAL SOCIETY OF CHEMISTRY NO. 14 1980 Diatomic Metals and Metallic Clusters THE FARADAY DIVISION THE ROYAL SOCIETY OF CHEMISTRY LONDON A SYMPOSIUM ON Diatomic Metals and Metallic Clusters 8th and 9th January 1980 A SYMPOSIUM on Diatomic Metals and Metallic Clusters was held at Owens Park University of Manchester on 8th and 9th January 1980. The President of the Faraday Division Professor J. S. Rowlinson F.R.S. was in the chair; about 70 Fellows of the Faraday Division and visitors from overseas attended the meeting. Among the overseas visitors were Dr. E. J. Baerends The Netherlands Prof. H. Basch Israel Dr. M. Benard France Dr. K. J. Cavell The Netherlands Prof. M. H. Chisholm U.S.A.Prof. F. A. Cotton U.S.A. Dr. 0. Echt West Germany Prof. K. A. Gingerich U.S.A. Prof G. Granozzi Italy Dr. K. Hilpert West Germany Dr. P. H. Kasai U.S.A. Mr. R. A. Meuli Switzerland Dr. A. R. Miedema The Netherlands Prof. P. Montano U.S.A. Prof. A. Oskam The Netherlands Prof. G. Ozin Canada Dr. D. Post The Netherlands Dr. L. Scheire Belgium Dr. I. Shim Denmark Dr. J. G. Snijders Tlle Netherlands Dr. G. G. Stanley France Dr. D. J. Stufkens The Netherlands Dr. H. Van Dam The Netherlands Mr. J. Van Der Velden The Netherlands Prof. A. Veillard France Prof. K. G. Weil West Germany Prof. J. S. Winn U.S.A. Organising Committee Prof. H. A. Skinner (Chairman) Dr. R. F. Barrow Dr. E. R. Buckle Dr. J.A. Connor Mrs. Y. A. Fish Dr. R. Grinter Dr. I. M. Hillier Dr. J. S. Ogden Dr. P. B. Wells Dr. D. A. Young ISBN 0-85186-998-X ISSN 0301-5696 0The Royal Society of Chemistry and Contributors 1980 Printed in Great Britain by Fletcher & Son Ltd. Norwich CONTENTS Page 7 Spectroscopy Chemistry and Catalysis of Metal Atoms Metal Dimers and Metal Clusters by G. A. Ozin 65 Electron Spin Resonance Study of Intermetallic Molecules CUM and AuM (M = Mg Zn Cd and Hg) by P. H. Kasai and D. McLeod Jr 79 Matrix Isolation Studies of Bimetallic Molecules of Fe-M(3d) Metals by P. A. Montano 87 Optical and Vibrational Studies of Siloer Molecules and Microcrystallites Prepared by Matrix Aggregation and Gas Aggregation Techniques by W.Schulze and H. Abe 94 Application of Magnetic Circular Dichroism Spectroscopy to the Ident$ca- tion of Small Matrix-isolated Metal Clusters and the Assignment of their Electronic Spectra by R. Grinter S. Armstrong U. A. Jayasooriya J. Mc- Combie D. Norris and J. P. Springall. 102 Gas Phase Production and Chemistry of Transition Metal Atoms and Clusters from Polynuclear Metal Carbonyls by J. S. Winn 109 Experimental and Predicted Stability of Diatomic Metals and Metallic Clusters by K. A. Gingerich 126 Models for Calculation of Dissociation Energies of Homonuclear Diatomic Molecules by L. Brewer and J. S. Winn 136 Model Predictions of the Dissociation Energies of Homonuclear and Hetero- nuclear Diatomic Molecules of Two Transition Metals by A.R. Miedema 149 Electronic Structure of Heavy Metal Diatomics from ab Initio Relaticistic EfSectire Core Potential Studies by H. Basch 159 Theoretical Study of the Electronic Structure of the Transition Metal Dimers Se, Cr, Mo andNi by C. Wood M. Doran I. M. Hillier and M. F. Guest 170 Structure and Electronic Properties of Copper Clusters by C. Bachmann J. Demuynck and A. Veillard 180 Dependence of Stability Bond Strength and Electronic Structure of Dimetal Units upon Atomic Number Oxidation Number and Chemical Encironment by B. E. Bursten and F. A. Cotton 194 Dynamic and Static Stereochemistry in Dimolybdenum and Ditungsten Com- pounds containing a Central (M-M)6+ Unit by M. H. Chisholm 21 1 Electronic Structure of Binuclear Metal Carbonyl Complexes by W. Heijser E. J. Baerends and P. Ros 235 GENERAL DISCUSSION 251 AUTHORINDEX