JSABrunskil1, A.Oe and GMFVas C hemistry D epartment , UWIST, C ardiff CFI 3NU, UK ... I a X=pF b X=p-Cl c X=OF d X=mF ... 1 Copyright 0 1978 by Marcel Dekker, Inc. All Rights Reserved. Neither this work nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage and retrieval system, without permission in writing from the ...