Stability of iso-butylene can be best explained by

Options

A. Inductive effect
B. Mesomeric effect
C. Hyperconjugative effect
D. Steric effect

Answer

C

Explanation

Because of hyperconjugation, the `CH_(3) - C` bond has some partial double bond character and consequently is shortened. Also, since hyperconjugation stabilises a molecule (through resonance), isobutylene, for example, should be more stable than 'expected'. This has been found to be so, the observed heat of hydrogenation of isobutylene is less than the calculated value.