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Rank of the following groups in order of...

Rank of the following groups in order of R, S precedence (IV is highest) : -
`underset(1)(-CH(CH_3)_2) " " underset(2)(-CH_2CH_2Br)" " underset(3)(-CH_2Br) " " underset(4)(-C(CH_3)_3)`

A

`2 gt 3 gt 1`

B

`1 gt 3 gt 2`

C

`3 gt 1 gt 2`

D

`2 gt 1 gt 3`

Text Solution

Verified by Experts

The correct Answer is:
D
I point of difference is applicable in CIP rule [on the basis of atomic No. or At. mass] 89.
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