Consider the following carbocations 1 . C 6 H 5 C + H 2 2 . C 6 H 5 C + H C H 3 3 . ( C 6 H 5 ) 2 C + H 4 . ( C 6 H 5 ) 3 C + The correct sequence of increasing order of their stabilities is

Question

Consider the following carbocations 1 . C 6 H 5 C + H 2 2 . C 6 H 5 C + H C H 3 3 . ( C 6 H 5 ) 2 C + H 4 . ( C 6 H 5 ) 3 C + The correct sequence of increasing order of their stabilities is, 1 < 2 < 4 < 3, 4 < 2 < 3 < 1, 1 < 2 < 3 < 4, 1 > 2 > 3 > 4

MARKS App · Accepted Answer

Resonance effect (+ M effect) are always more stabilizing than the inductive effects (+I effect), because +M groups neutralize the +ve charge on the carbon atom more effectively than the +I groups. Triphenyl carbocation in the most stable in this series, because its +ve charge is dispersed by resonance (+M effect of - C 6 H 5 group). The correct order of stability is 1 < 2 < 3 < 4

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