Question

What is the correct name of the compound with two amino groups around a benzene ring at opposite (para) positions?

(a) Benzenediamine

(b) 4-Aminobenzenamine

(c) p-Aminoaniline

(d) Benzene-1,4-diamine

The question was asked by my college director while I was bunking the class.

My doubt is from Amines Nomenclature in section Amines of Chemistry – Class 12

Answer 1

Right choice is (d) Benzene-1,4-diamine

To elaborate: Both the amino groups (at para position to each other) are given equal importance and is named by giving the prefix di to the main compound. The prefix is also numbered 1 and 4, representing the positions at which amino groups are present in the benzene ring.