• # 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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