Please answer this question:
What is the IUPAC name of:
Fig.
(A) 3-mercapto-5-amino benzene carboxylic acid.
(B) 3-amino-5-mercapto benzene carboxylic acid.
(C) 5-amino-3-mercapto benzene carboxylic acid.
(D) 5-mercapto-3-amino benzene carboxylic acid.
Dear student,
The -COOH is the most prior functional group. The amino ( -NH2) group gets alphabetic preference.
Hence, amino is located at position 3. It is followed by mercapto (-SH) group at position 5.
So IUPAC name is 3-amino-5-mercapto benzene carboxylic acid.
Correct answer is option B.
Regards!