1.

Assertion (A): There are three hyperconjugration structure of ethyl cation CH_(3) overset(+)(C )H_(2). Reason (R ): Ethyl cation CH_(3) overset(+)(C )H_(2) is a carbocation

Answer»

Statement (A) and REASON (R ) both are right. Statement (R ) is correct explanation of statement (A)
Statement (A) and Reason (R ) both are right, but (R ) is not correct explanation of statement (A)
Both Statement (A) and (R ) are wrong
Statement (A) is right but statement (R ) is wrong

Solution :Assertion (A) is correct because the three hyperconjugation structure of `CH_(3)CH_(2)^(+)` are as under
`H= underset(underset(H)(|))OVERSET(overset(H)(|))(C )- underset(underset(H)(|))overset(oplus)(C )-H harr underset((I))(H- underset(underset(H)(|))overset(overset(oplus)(H))(C )= underset(underset(H)(|))(C )-H) harr underset((II))(overset(oplus)(H) underset(underset(H)(|))overset(overset(H)(|))(C )-= underset(underset(H)(|))(C )- H) harr underset((III))(H- underset(H^(oplus))overset(overset(overset(oplus)(H))(|))(C )= underset(underset(H)(|))(C )-H)`
`CH_(3) overset(+)(C )H_(2)` is a carbocation. so it is correct. Because the positive charge is present in carbon of `CH_(2)`.
Correct reason: In addcont POSITION of `overset(+)(C )H_(2) CH_(3)` group is than in which three C-H bond present in which three hyperconjugation structure are possible


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