Home
Class 11
CHEMISTRY
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)`
Promotional Banner

Similar Questions

Explore conceptually related problems

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

The order of decreasing stability of the carbanions : (CH_(3))_(3)C^(-)(I),(CH_(3))_(2)CH^(-)(II), CH_(3)CH_(2)^(-)(III), C_(6)H_(5)CH_(2)^(-)(IV) is

The order of stability of the following carbocations underset((I))(CH_(2)=overset(+)(C)H-CH_(2)) , underset((II))(CH_(3)-CH_(2)-overset(+)(C )H_(2))