Question

According to the selection rules, the decreasing order of preference is __________

(a) –NH2 > -C6H5 > -CH(CH3)^2 > -H

(b) –CH(CH3)^2 > -C6H5 > -H> -NH2

(c) –NH2 > -CH(CH3)^2 > -C6H5 > -H

(d) -C6H5 > -CH(CH3)^2 >–NH2 > -H

The question was asked during an interview.

The doubt is from R, S- Configuration and Water Softening topic in division Structure and Stereostructure of Molecules of Engineering Chemistry I

Answer 1

The correct option is (a) –NH2 > -C6H5 > -CH(CH3)^2 > -H

The best I can explain: The atom of higher atomic numbers gets higher priority. So, –NH2 group has the highest priority of all.