Question

Hyper conjugation involves overlap of following orbitals

• A. σ – π
• B. π – π
• C. p – p
• D. σ – σ

Hint:

σ(C–H) donating into π* = hyperconjugation signature.

Answer 1

The Correct Option is A

Step 1: Hyperconjugation is interaction of C–H σ bond with adjacent empty/partially filled π orbital.
Step 2: Therefore type = σ–π only.
Step 3: π–π is resonance; p–p is covalent sigma. Hence → (A).