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8.2 Organic chemistry isomerism — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry8.2 Organic chemistry isomerism1 Mark
MCQ
Among the following the most stable compound is
  • A
    $cis - 1,2 - cyclohexanediol$
  • B
    $trans - 1,2 - cyclohexanediol$
  • C
    $cis - 1,3 - cyclohexanediol$
  • ✓
    $trans - 1,3 - cyclohexanediol$
✓

Answer

Correct option: D.
$trans - 1,3 - cyclohexanediol$
d
(d) 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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