乙基(英語:Ethyl group)是一個烴基官能團,化學式為—C2H5,簡寫為—Et(Ethyl)。最簡單的乙基化合物為乙烷(C2H6),乙基與氫原子相連。其他包括氯乙烷溴乙烷乙醇乙胺硝基乙烷等。

乙基的結構。

乙基化指向分子中引入乙基官能團的過程,參見烷基化

參見

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