A) \[{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}>\overline{C}C{{l}_{3}}>{{(C{{H}_{3}})}_{3}}\overline{C}>{{(C{{H}_{3}})}_{2}}\overline{C}H\]
B) \[{{(C{{H}_{3}})}_{2}}\overline{C}{{H}_{2}}>\overline{C}C{{l}_{3}}>{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}>{{(C{{H}_{3}})}_{3}}\overline{C}\]
C) \[\overline{C}C{{l}_{3}}>{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}>{{(C{{H}_{3}})}_{2}}\overline{C}H>{{(C{{H}_{3}})}_{3}}\overline{C}\]
D) \[{{(C{{H}_{3}})}_{3}}\overline{C}>{{(C{{H}_{3}})}_{2}}\overline{C}H>{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}>\overline{C}C{{l}_{3}}\]
Correct Answer: C
Solution :
[c] : The groups having +J effect decrease the stability while groups having -I effect increase the stability of carbanions. Benzyl carbanion is stabilized due to resonance. Also, out of\[~2{}^\circ \]and\[3{}^\circ \] carbanions, \[2{}^\circ \]carbanions are more stable, thus the decreasing order of stability is \[\overline{C}C{{l}_{3}}>{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}>{{(C{{H}_{3}})}_{2}}\overline{C}H>{{(C{{H}_{3}})}_{3}}\overline{C}\]
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