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Why does 1,2-dimethylcyclohexane in chair form have only three stereoisomers?
I understand that the trans isomer doesn't possess plane of symmetry and thus it has two stereoisomers. But my book says that the cis isomer has does not have two stereoisomers. Why is this so?
The structure of cis-1,2-dimethylcyclohexane is shown above. Its mirror image is non-superimposable and cannot be obtained by rotation about single single bonds or by a ring flip. Can anyone explain?Thanks