Question

What is IUPAC name of the compound \(\text{CH}_3\text{CH=CHCH=CHCOOH}\) ?

• A. Hexanedioc acid
• B. Hexa-2,4-dienoic acid
• C. Penta-1,3-dienoic acid
• D. Pentenedioc acid

Hint:

Number from the COOH carbon and place the two double bonds at 2 and 4.

Answer 1

The Correct Option is B

Step 1: Longest chain
The chain has 6 carbons, numbered from the COOH carbon.

Step 2: Locate double bonds
C2=C3 and C4=C5, so the locants are 2 and 4.

Step 3: Name it
Six carbons give hex, two double bonds give dien, and the acid gives oic acid: hexa-2,4-dienoic acid, option (B).

Final Answer:
Option (B). \[ \boxed{\text{Hexa-2,4-dienoic acid}} \]