The arrangement of `(CH_(3))_(3)C-,(CH_(3))_(2)CH-,CH_(3)CH_(2)-` when attached to benzene or unsaturated group in increasing order of inductive effect is:

Options

A. `(CH_3)_3 C -lt (CH_3)_2CH- lt CH_3 CH_2 -`
B. `CH_3 CH_2 - lt (CH_3)_2 CH - lt (CH_3)_3C -`
C. `(CH_3)_2 CH - lt (CH_3)_3 C - lt CH_3 CH_2 - `
D. `(CH_3)_3 C - lt CH_3 CH_2 - lt (CH_3)_2CH - `

Answer

A

Explanation

The inductive effect of the alkyl group is attached to an unsaturated system such as double bond or a benzene ring, the order of inductive effect is actually reversed. This effect is called hyperconjugation effect or Baker-Nathan effect. Now, the order is `(CH_3)_3 C - lt (CH_3)_2 CH - lt CH_3 - CH_2 lt CH_3 - `