Consider the following carbocations (I)`C_(6)H_(5)overset(+)CH_(2)` , (II)`C_(6)H_(5)CH_(2)overset(+)CH_(2)` (III)`C_(6)H_(5)overset(+)CHCH_(3)` , (IV) `C_(6)H_(5)overset(+)C(CH_(3))_(2)` The correct sequence for the stability of these isA. `IIltIltIIIltIV`B. `IIltIIIltIltIV`C. `IIIltIltIIltIV`D. `IVltIIIltIltII`

Consider the following carbocations (I)`C_(6)H_(5)overset(+)CH_(2)` ,

1.	Consider the following carbocations (I)`C_(6)H_(5)overset(+)CH_(2)` , (II)`C_(6)H_(5)CH_(2)overset(+)CH_(2)` (III)`C_(6)H_(5)overset(+)CHCH_(3)` , (IV) `C_(6)H_(5)overset(+)C(CH_(3))_(2)` The correct sequence for the stability of these isA. `IIltIltIIIltIV`B. `IIltIIIltIltIV`C. `IIIltIltIIltIV`D. `IVltIIIltIltII`
Answer» Correct Answer - A IV is stabilised by +I effect of two `CH_(3)` groups and by dispersal of + ve charge on the benzene ring by resonance. III is stabilized by + I effect of one `CH_(3)` group and by dispersal of + ve charge on the benzene ring. I is stabilized by dispersal of +ve charge on the benzene ring. II is not stabilized by any of the above factors `therefore `over all order of stability is `IIltIltIII ltIV` Hence (A) is correct.

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