Question

How many hyperconjugative structures are
possible for 2 - butene?​

Answer 1

Answer:

Hyperconjugation is due to the interaction of the electrons in σ bond (C-H or C-C) with adjacent empty or partly filled non-bonding p-orbital, antibonding π orbital or filled π orbital.

This result in extended molecular orbital and increases the stability of the system.

In case of tert-butyl cation, the hyperconjugation is due to the interaction of the electrons in the σ bond with adjacent empty p-orbital.

H

3

C−

CH

3

∣

C

⊕

∣

CH

3

σ−p(empty)

In case of 2-butene, the hyperconjugation is due to the interaction of σ orbital with antibonding π orbital.

H

3

C−CH=CH−CH

3

σ−π

∗

(antibonding)

Answer 2

Answer:

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