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Which of the following names of aromatic amines does not belong to the common naming system?

(a) Aniline

(b) o-Toluidine

(c) 4-Bromoaniline

(d) N^–Methylaniline

I have been asked this question in unit test.

This is a very interesting question from Amines Nomenclature in section Amines of Chemistry – Class 12

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The correct answer is (c) 4-Bromoaniline

Best explanation: In the common system, the aromatic amines have special names derived from the basic compound aniline and depending upon the type of substituent group. The prefixes o-, m- and p- are used to depict the position of the substituent in common system. Whereas, the number position of carbon is used in the IUPAC system.

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