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Some Other IUPAC Titles of Interest from Pergamon Press Books ANANCHENKO: Frontiers of Bioorganic Chemistry and Molecular Biology FREIDLINA & SKOROVA: Organic Sulfur Chemistry GOETHALS: Polymeric Amines and Ammonium Salts HOGFELDT: Stability Constants of Metal-Ion Complexes, Part A: Inorganic Ligands LAURENT: Coordination Chemistry—21 PARRY: Boron Chemistry—4 PERRIN: Stability Constants of Metal-Ion Complexes, Part B: Organic Ligands RIGAUDY & KLESNEY: Nomenclature of Organic Chemistry ST-PIERRE & BROWN: Future Sources of Organic Raw Materials STEC: Phosphorus Chemistry Directed Towards Biology TROST & HUTCHINSON: Organic Synthesis—3 VARMAVUORI: 27th International Congress of Pure and Applied Chemistry Journals* CHEMISTRY INTERNATIONAL, the news magazine for chemists in all fields of specialization in all countries of the world PURE AND APPLIED CHEMISTRY, the international research journal publishing proceedings of IUPAC conferences, nomenclature rules and technical reports *Free specimen copy of any journal available on request Please write to your nearest Pergamon Office for details of any of the above books or journals INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY (Inorganic Chemistry Division) in conjunction with Indian Chemical Society (Calcutta) COORDINATION CHEMISTRY—20 Invited Lectures presented at the 20th International Conference on Coordination Chemistry Calcutta, India, 10-14 December 1979 Editor D. BANERJEA University of Calcutta, India PERGAMON PRESS OXFORD • NEW YORK • TORONTO • SYDNEY • PARIS • FRANKFURT U.K. U.S.A. CANADA Pergamon Press Ltd.. Headington Hill Hall, Oxford 0X3 OBW, England Pergamon Press Inc., Maxwell House. Fairview Park. ElmsfordL New York 10523, U.S.A. Pergamon of Canada, Suite 104. 150 Consumers Road, Willowdale, Ontario M2J 1P9, Canada AUSTRALIA Pergamon Press (Aust.) Pty. Ltd., P.O. Box 544, Potts Point, N.S.W. 2011. Australia FRANCE Pergamon Press SARL, 24 rue des Ecoles. 75240 Paris. Cedex 05. France FEDERAL REPUBLIC OF GERMANY Pergamon Press GmbH, 6242 Kronberg-Taunus. Hammerweg 6, Federal Republic of Germany Copyright © 1980 International Union of Pure and Applied Chemistry All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means: electronic. electrostatic, magnetic tape, mechanical, photocopying, recording or otherwise, without permission in writing from the copyright holders. First published 1980 British Library Cataloguing in Publication Data International Conference on Coordination Chemistry, 20th, Calcutta, 1979 Coordination chemistry, 20. 1. Coordination compounds - Congresses I. Title II. Banerjea, D III. International Union of Pure and Applied Chemistry. Inorganic Chemistry Division IV. Indian Chemical Society 541\2242 QD474 80-41163 ISBN 0-08-023942-0 In order to make this volume available as economically and as rapidly as possible the author's typescript has been reproduced in its original form. This method has its typographical limitations hut it is hoped that they in no way distract the reader. Printed in Great Britain by A. Wheat on & Co. Ltd., Exeter Sponsors International Union of Pure and Applied Chemistry Indian National Science Academy, New Delhi Department of Science & Technology, Government of India, New Delhi President P. Ray Convener D. Banerjea Organizing Committee Chairman: D. Banerjea; Members; P. K. Bhattacharya, A. Chakravorty, M. C. Chakravorti, A. K. De, A. K. Dey, R. L. Dutta, B. C. Haldar, M. M. Taqui Khan, P. T. Manoharan, R. C. Mehrotra, H. L. Nigam, R. C. Paul, S. N. Poddar, C. N. Rao, D. V. Ramana Rao, H. K. Saha, J. Shankar INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY IUPAC Secretariat: Bank Court Chambers, 2-3 Pound Wa