Apologies for multiple posting Nomenclature of Fused Ring and Bridged Fused Ring Systems With the appearance of the January issue of Pure and Applied Chemistry the IUPAC recommendations on the nomenclature of fused ring and bridged fused ring systems have appeared (PAC 1998, 70, 143-216). This document is the first published set of rules which attempts to comprehensively cover this class of compounds. It is a very much expanded version of the brief summary in the general Organic Rules. The Web version of this document is now available from the IUPAC Organic Nomenclature Home Page (URL below) or direct from: http://www.chem.qmw.ac.uk/iupac/fusedring/ For those interested in the use of this nomenclature database the latest data analysing the usage per million population by country has been plotted on a revised world and Europe map. This corresponds to about 80000 users from 97 countries. It is at: http://www.chem.qmw.ac.uk/iupac/usage/ Gerry Moss _________________________________________________________________________ Dr GP Moss Telephone: +44 171 775 3262 Department of Chemistry Queen Mary & Westfield College Facsimile: +44 181 981 8745 Mile End Road London E1 4NS, United Kingdom E-mail: g.p.moss@qmw.ac.uk World Wide Web server: http://www.chem.qmw.ac.uk/ IUPAC chemical nomenclature data base: http://www.chem.qmw.ac.uk/iupac/ IUBMB biochemical nomenclature data base: http://www.chem.qmw.ac.uk/iubmb/ chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)