Question

What is the correct IUPAC name of the compound shown below?

• A. 3-bromo-5-(3'-cynophenyl)phenol
• B. 5-bromo-3-(3'-cynophenyl)phenol
• C. 3-(3'-hydoxy-5'-bromophenyl)benzonitrile
• D. 3-(3'-bromo-5'-hydroxyphenyl)benzonitrile

Answer 1

The correct option is D 3-(3'-bromo-5'-hydroxyphenyl)benzonitrile

The primary functional group is $-CN$. Hence, the benzene ring attached to nitrile group becomes the base chain. The substituent benzene chain is on the third carbon. Since it is a substituated substituent, the $-Br$ and $-OH$ groups also need to be numbered.
Hence, the final name will be 3-(3'-bromo-5'-hydroxyphenyl)benzonitrile