Question

Explain why the + charge of the carbocation always appears at the carbon of the (former) double bond that has NOT bonded to the electrophile.

Answer 1

CH₂=CH₂-CH₂⁺ in this case of carbocation is stabilised by conjugation of double bond that means +ve charge dispersed by double bond it stabilised the + ve charge .

But in another case when positive charge attached to adjacent electrophilic center destabilised the +ve charge present to the carbon O=CH-CH₂⁺ . Electrophilic center is a electron withdrawing nature that means it increases the +ve charge on adjacent carbon atom and destabilised the +ve charge.