Explain why `(CH_(3))_(3)overset(+)(C )` is more stable than `CH_(3)overset(+)(C )H_(2) and overset(+)(C )H_(3)` is the least stable cation.

Explanation

Hyperconjugation interacton in `(CH _(3)) _(3) overset( +) (C).` is greater than in `CH _(3) overset(+) (C ) H _(2)` as the `(CH _(3)) _(3) overset(+) (C)` has nine C-H bonds. ln `overset(+) (C) H _(3),` vacant p orbital is perpendicular to the plane in which. C-H bonds lie, hence cannot overlap with it. Thus, `overset( +) (C) H _(3)` laock hyperconjugative stability.