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the ascending order of stability of the ...

the ascending order of stability of the carbanion `CH_(3)(P),C_(6)H_(5)overline(C)H_(2)(Q),(CH_(3))_(2)overline(C)H(R)` and
`H_(2)overline(C)-CH=CH_(2)(S)` is

A

`P lt R lt S lt Q `

B

`R lt P lt S lt Q`

C

`R lt P lt Q lt S`

D

`P lt R lt Q lt S`

Text Solution

Verified by Experts

The correct Answer is:
B
Stability of carbanions is enhanced by
(i) Presence of conjugation
(ii) Presence of group exerting –I effect
So correct order is
`(CH_(3))_(2) underset( R) (barC) H lt underset(P) (barC)H_(3) lt barC H_(2) underset(S) (-) CH = CH_(2) underset(lt) (lt) C_(6) underset(Q) (H_(5)) barC H_(2)`
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