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8.4. Organic chemistry reaction mechanism — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry8.4. Organic chemistry reaction mechanism1 Mark
MCQ
Which amongst the following is the most stable carbocation
  • A
    $C{H_3} - \mathop {\mathop C\limits_|^ + \;\;\;\;}\limits_{C{H_3}} $
  • ✓
    $C{H_3} - \mathop {\mathop {{C^ + }}\limits_{|\;\;}^{|\;\;} \;\;}\limits_{C{H_3}}^{C{H_3}} $
  • C
    $\mathop C\limits^ + {H_3}$
  • D
    $C{H_3}\mathop C\limits^ + {H_3}$
✓

Answer

Correct option: B.
$C{H_3} - \mathop {\mathop {{C^ + }}\limits_{|\;\;}^{|\;\;} \;\;}\limits_{C{H_3}}^{C{H_3}} $
b
(b)$C{H_3} - \mathop {\mathop {{C^ + }}\limits_{|\,}^{|\,\,} \;\;\;}\limits_{C{H_3}}^{C{H_3}} $ Due to $(+I)$ effect of three methyl group $3^°$ carbocation is more stable.

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