Question

Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is:

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Now,

3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid

word root is hex $\Rightarrow$ 6 carbons

Now,3-en and 5 ynoic acid $\Rightarrow$ double bond at $C_3$

Triple bond at $C_5$

Oic acid $\Rightarrow$ -COOH group at $C_1$

Now,

3-Ethyl-2-hydroxy-4-methyl

[Hydroxy is prefix of-OH]

This is the final structure