Which of the following carbocation is most stable ?

Options

A. `CH_(3)overset(+)CH_(2)`
B. `CH_(2)=overset(+)CH`
C. `CHequivC^(+)`
D. `C_(6)H_(5)^(+).`

Answer

A

Explanation

`CH_(3)overset(+)CH_(2)` is the most stable carbocation. This can be explained as follows. The electronegativity of carbon increases as its hybridisation from `sp^(3)`. to `sp^(2)` to sp i.e., carbon which is `sp^(3)`-hybridised is least electronegative and `sp^(2)`-hybridised carbon is most electronegative. An element with least electronegativity can best accommodate + ve charge. In `CH_(3)overset(+)CH_(2)`, carbon is `sp^(3)` hybridised