E

E

Thatmeansthattheleft-handisomerinthelastdiagramisthe(E)-form,andtheright-handonethe(Z)-.Extendingtherulestomorecomplicatedmolecules.。其他文章還包含有:「TheE」、「E–Znotation」、「EZ标记」、「EZ標記」、「7.6:SequenceRules」、「E,Z系統」、「E–Zsystem(video)」、「NamingAlkenesUsingEZSystem」

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RulesfordeterminingprioritiesTheseareknownasCahn-Ingold-Prelog(CIP)rulesafterthepeoplewhodevelopedthesystem.ThefirstruleforverysimplecasesYoulookfirstattheatomsattacheddirectlytothecarbonatomsateachendofthedoublebond-thinkingaboutthetwoendsseparately.Letslookattheexamplewevebeentalkingabout.Justconsiderthefirstisomer-andlookseparatelyattheleft-handandthentheright-handcarbonatom.Comparetheatomicnumbersoftheattachedatomstoworkoutthevariouspriorities.Noticethattheatomswiththehigherprioritiesare...