Quarterly Reviews No I Vol 21 1967 Organic Chemistry of Periodates By B. Sklarz The Mechanism of Rusting By U. R. Evans F.R.S. The Chemistry and Biological Function of Isoalloxazines (Flavines) By G. R. Penzer and G. K. Radda Page 3 29 43 Vibration-Vibration Energy Transfer in Gaseous Collisions By J. D. Lambert 67 The Hydrated Electron By D. C. Walker 79 Molecular Polyhedra of High Co-ordination Number By E. L. Muetterties and C. M. Wright 109 The Chemical Society London Quarterly Reviews contains articles by recognised authorities on selected topics from general physical inorganic and organic chemistry. The Journal and Annual Reports interest primarily the research worker Quarterly Reviews is designed for a wider range of readers. It is intended that each review article shall be of interest to chemists generally and not only to workers in the particular field being reviewed. The submission of reviews for publication is welcomed but intending authors are advised to write in the first place to the Editor The Chemical Society Burlington House Piccadilly London W. 1. Such preliminary communications should be accompanied by an outline of the ground to be covered rather than by the completed manuscript Price to non-fellows E4 10s. Od. per annum @ Copyright reserved by The Chemical Society 1967 Published by The Chemical Society Burlington House London. Printed in England by The Thanet Press Margate.