JEE Main & Advanced Chemistry GOC Question Bank Structural and stereo isomerism

  • question_answer Among the following the most stable compound is [AIIMS 2005]

    A) \[cis-1,2-cyclohexanediol\]

    B) \[trans-1,2-cyclohexanediol\]

    C) \[cis-1,3-cyclohexanediol\]

    D) \[trans-1,3-cyclohexanediol\]

    Correct Answer: D

    Solution :

    Trans configuration is more stable than cis configuration because in cis-configuration the H groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configurations, in 1-3, the OH groups are placed further apart to minimise the repulsion. Hence, more stable is 1,3-configuration.

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