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Given below are two statements : State...

Given below are two statements :
Statement I : Hyperconjugation is a permanent effect.
Statement II: Hyperconjgation is ethyl cation `(CH _(3) -overset(+) (C)H _(2))` involves the overlapping of `C _( sp ^(2)) - H _(1s)` bond with empty 2p orbial of other carbon.
Choose the correct option :

A

Both statement I and statement II are false

B

Statement I is incorrect but statement II is true

C

Statement I is correct but statement II is false

D

Both Statement I and statement II are true.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the two statements given about hyperconjugation and the ethyl cation. ### Step-by-step Solution: 1. **Understanding Hyperconjugation**: - Hyperconjugation is an effect that involves the delocalization of electrons in sigma bonds (C-H or C-C) with adjacent empty p-orbitals or π-bonds. - It is considered a permanent effect because it contributes to the stability of carbocations and alkenes. 2. **Evaluating Statement I**: - **Statement I**: "Hyperconjugation is a permanent effect." - This statement is **True**. Hyperconjugation is indeed a permanent effect that stabilizes carbocations and other species through electron delocalization. 3. **Evaluating Statement II**: - **Statement II**: "Hyperconjugation in ethyl cation `(CH3-CH2+)` involves the overlapping of `C_(sp^2) - H_(1s)` bond with the empty 2p orbital of the other carbon." - In the ethyl cation, the carbon atom with the positive charge is `sp^2` hybridized. The adjacent carbon atom is `sp^3` hybridized. - The overlap in hyperconjugation occurs between the `C-H` sigma bond of the `sp^3` carbon and the empty `p` orbital of the `sp^2` carbon, not the other way around as stated. - Therefore, the statement is **False**. The overlap is not between `C_(sp^2) - H_(1s)` and the empty p-orbital of the other carbon, but rather between `C_(sp^3) - H_(1s)` and the empty p-orbital of the `sp^2` carbon. 4. **Conclusion**: - Statement I is True. - Statement II is False. - Therefore, the correct option is that Statement I is true and Statement II is false. ### Final Answer: - Statement I is True. - Statement II is False.
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