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{"term":{"metadata":{"id":"00732","doi":"10.1351\/goldbook.B00732","code":"B00732","status":"current","longtitle":"IUPAC Gold Book - Bredt's rule","title":"Bredt's rule","contexts":[],"index":null,"version":"2.3.3","lastupdated":"2014-02-24"},"definitions":{"definition":[{"id":"1","text":"A double bond cannot be placed with one terminus at the bridgehead of a bridged ring system unless the rings are large enough to accommodate the double bond without excessive strain. For example, while bicyclo[2.2.1]hept-1-ene is only capable of existence as a transient, its higher homologues having a double bond at the bridgehead position have been isolated: e.g. [image: Not defined]","contexts":{"in":[],"of":[]},"chemicals":[{"type":"chemimage","title":"Not defined","file":"B00732.png"}],"links":[{"type":"goldify","url":"https:\/\/goldbook.iupac.org\/terms\/view\/B00736"},{"type":"internal","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S06037"},{"type":"internal","url":"https:\/\/goldbook.iupac.org\/terms\/view\/T06451"}],"math":[],"sources":["PAC, 1994, 66<\/em>, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1077 (https:\/\/doi.org\/10.1351\/pac199466051077)","PAC, 1996, 68<\/em>, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2201 (https:\/\/doi.org\/10.1351\/pac199668122193)"]}]},"links":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/B00732\/html","json":"https:\/\/goldbook.iupac.org\/terms\/view\/B00732\/json","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/B00732\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/B00732\/plain","pdf":"https:\/\/goldbook.iupac.org\/terms\/view\/B00732\/pdf"},"citeas":"IUPAC. Compendium of Chemical Terminology, 2nd ed. (the \"Gold Book\"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https:\/\/doi.org\/10.1351\/goldbook.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC-BY-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nd\/4.0\/)","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2019-08-19T21:03:14+00:00"}}