3,4-二甲基己烷(英語:3,4-Dimethylhexane),结构简式(CH3CH2CH(CH3))2,是辛烷的同分异构体[1],存在两个手性碳原子,但由于分子存在对称性,因而存在一个内消旋体,故总共有三个立体异构体[2],分别为:
- (3R,4R)-3,4-二甲基己烷 CAS号:52919-17-2
- (3S,4S)-3,4-二甲基己烷 CAS号:10203-80-2
- (3R,4S)-3,4-二甲基己烷 CAS号:52949-33-4 (内消旋化合物)
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