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Give the decreasing order of hyperconjug...

Give the decreasing order of hyperconjugative effect of `R` in `R - CH = CH_2`, where `R` is :
(I) `Me-`
(II) `Et-`
(III) `Me_2CH-`
(IV) `Me_3C-`.

A

`I gt II gt III gt IV`

B

`IV gt III gt II gt I`

C

`II gt I gt III gt IV`

D

`IV gt III gt I gt II`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) In `Me -(3 alpha-H) gt CH_3-CH_2 - (2 alpha - H)` `(1 alpha - H) Me_3 C-(no alpha - H)`.
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