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While assigning R,S configuration the co...

While assigning R,S configuration the correct order of priority of groups attached to chiral carbon atom is

A

`CONH_2gt COCH_3gt CH_2OHgt CHO`

B

`CONH_2 gt COCH_3 gt CHO gt CH_2OH`

C

`CONH_3 gt COCH_2 gt CHO gt CH_2OH`

D

`COH gt CH_2OH gt COCH_3 gt CONH_2`

Text Solution

Verified by Experts

The correct Answer is:
B
The correct priority order for the groups attached to chiral carbon atom is `CONH_2 gt COCH_2 gt CHO gt CH_2OH` This order can be explained by these two rules:
(i) Higher priority is assigned to atoms (directly attached to the carbon atom) of higher atomic number.
(ii) A doubly or triply bonded atom is considered equivalent to two or three such atoms.
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