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An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with 2 Br and KOH forms a compound ‘C’ of molecular formula 6 7 C H N . Write the structures and IUPAC names of compounds A, B, C.

An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with 2 Br and KOH forms a compound ‘C’ of molecular formula 6 7 C H N . Write the structures and IUPAC names of compounds A, B, C.

Grade:upto college level

1 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago

Hello Student
It is given that compound‘C’having the molecular formula,C6H7Nis formed by heating compound ‘B’ with Br2 and KOH. This is aHoffmannbromamidedegradation reaction. Therefore, compound ‘B’ is an amide and compound‘C’is an amine. The only amine having the molecular formula, C6H7Nis aniline, (C6H5NH2). Therefore, compound ‘B’ (from which’C’is formed) must bebenzamide, (C6H5CONH2). Further, benzamide is formed by heating compound ‘A’ with aqueous ammonia. Therefore, compound ‘A’ must be benzoic acid.

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