Question

Among the following carbocations :
(I) `Ph_(2)overset(+)"C"CH_(2)Me (II) PhCH_(2)CH_(2)overset(+)"C"HPh`
`"(III) "Ph_(2)CHoverset(+)"C"HMe" (IV) "Ph_(2)C(Me)overset(+)"C"H_(2)` the order of stability is :
A. `IV gt II gt I gt III`
B. `I gt II gt III gt IV`
C. `II gt I gt IV gt III`
D. `I gt IV gt III gt II`

Answer 1

Correct Answer - B

Stability of carbocation depends upon number of resonating structures and extent of +I, -I effect.