摘要: 已知乙烯分子呈现平面结构且碳碳双键不能旋转.因此1,2-二氯乙烯可以形成和两种不同的空间异构体.下列各物质中.能形成类似上述两种空间异构体的是········································································································( ) A. CH2=CCl2 B. CH3CH=CH2 C. CH3CH2CH=CH2 D.CH3CH=CHCH3

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