Arrange them in the increasing order of Carbocation Stability
Dear student,
The order of stability is (IV) < (I) < (II) <(III)
The phenylic carbocation is least stable because the C is sp2 hybridised and positive charge is not a part of the resonance.
The carbocation in option (b) is secondary carbocation and hence stable than (IV).
In option(II), the positive charge is involved in resonance and hence more stable
In option (III), the resonance is more and the positive charge is more decolocalised. Hence it is most stable.
Regards!!
The order of stability is (IV) < (I) < (II) <(III)
The phenylic carbocation is least stable because the C is sp2 hybridised and positive charge is not a part of the resonance.
The carbocation in option (b) is secondary carbocation and hence stable than (IV).
In option(II), the positive charge is involved in resonance and hence more stable
In option (III), the resonance is more and the positive charge is more decolocalised. Hence it is most stable.
Regards!!