Which of the following hydrocarbon molecules are capable of exhibiting hyperconjugation ( or overlap — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Propene has 3 $\alpha$ -H next to a $C=C$ bond. Toluene has 3 $\alpha$ -H next to the aromatic $\pi$ system. Ethyl carbocation has 3 $\alpha$ -H next to an empty p-orbital. Benzaldehyde has no $sp^3$ hybridized carbon with $\alpha$ -hydrogens attached to the ring, so it cannot show hyperconjugation.