Question

The IUPAC name of the following compound is:

• A. 1-Bromo-2-hydroxybenzonitrile
• B. 2-Bromo-3-cyanophenol
• C. 2-Bromo-3-hydroxybenzonitrile
• D. 3-Hydroxy-2-bromobenzonitrile

Hint:

Always assign the lowest locant to the highest-priority functional group (–CN>–OH>–Br), and number accordingly around the benzene ring.

Answer 1

The Correct Option is C

To name the compound using IUPAC rules:
1. Identify the parent chain: Benzene ring with substituents.
2. Principal functional group: Nitrile (–CN), which has highest priority, so suffix will be benzonitrile.
3. Number the ring: Start from –CN as position 1, and number in such a way that the other substituents get the lowest locants.
Structure:
- Position 1: –CN (priority group)
- Position 2: –Br
- Position 3: –OH
Putting it together: \[ \text{2-Bromo-3-hydroxybenzonitrile} \]