First slide

Nomenclature

Question

IUPAC name of the following structure is

Easy

A

3 - bromo - 5 - hydroxy benzene oic acid
B

5 - bromo - 3 - hydroxy benzene oic acid
C

5 - bromo - 3 - hydroxy benzene carboxylic acid
D

3 - bromo - 5 - hydroxy benzene carboxylic acid

Solution

-COOH is the principal functional group.
-Br and -OH groups are treated as substituents.
Locant rule cannot be applied. Substituents are at equivalent positions.
Alphabetical order is followed for numbering and naming ;
IUPAC name :
3 - bromo - 5 - hydroxy benzene carboxylic acid ;

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