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Endo-exo isomerism : ウィキペディア英語版 | Endo-exo isomerism ''Endo''-''exo'' isomerism is a special type of isomerism found in organic compounds with a substituent on a bridged ring system. The prefix ''endo'' is reserved for the isomer with the substituent located closest, or "''syn''", to the longest bridge. The prefix ''exo'' is reserved for the isomer with the substituent located farthest, or "''anti''", to the longest bridge. Here "longest" and "shortest" refer to the number of atoms that comprise the bridge. This type of molecular geometry is found in norbornane systems such as dicyclopentadiene. The terms ''endo'' and ''exo'' are used in a similar sense in discussions of the stereoselectivity in Diels–Alder reactions. ==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Endo-exo isomerism」の詳細全文を読む
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