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Arrange the carbanions, (CH(3))(3)bar(C)...

Arrange the carbanions, `(CH_(3))_(3)bar(C),bar(C)Cl_(3),(CH_(3))_(2)bar(C)H,C_(6)H_(5)bar(C)H_(2)`, in order of their decreasing stability

A

`A gt B gt C`

B

`B gt A gt C`

C

`C gt B gt A`

D

`C gt A gt B`

Text Solution

Verified by Experts

The correct Answer is:
B
`+`I-effect decreases the stability of carbon anion. Since, `(CH_(3))` group has `+I`-effect, therefore, it intensifies the negative charge and hence destabilises (A) ralatibe to (B). Sp hybridised carbanion is more stabilised thamn `sp^(3)`
`underset("Hence")underset((B)^(sp))(CH-=C^(-)gtCH_(3)-C-=)underset((A)^(sp))C^(-)gtunderset((BgtAgtC))(underset((C))(CH_(3))-underset(sp^(3))CH_(2))`
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