Question

The correct IUPAC name of the following structure is :

• A. 2-hydroxy-3-propyl-4-ethyl-hex-3-en-5-ynoic acid
• B. 4-ethyl-2-hydroxy-3-propylhex-3-en-5-ynoic acid
• C. 2-hydroxy-3-propylhex-3-en-(2-ethynyl)-oic acid
• D. None of the above

Answer 1

The correct option is B 4-ethyl-2-hydroxy-3-propylhex-3-en-5-ynoic acid

Since there is a carboxylic group atttached, it has the highest priority and is the principal functional group. Alcohol group has the prefix (-hydroxy)
Suffix of carboxylic acid is (-oic acid)

Choose that carbon chain which includes maximum number of double and triple bonds.
The IUPAC naming of substituents is written in alphabetical order.


The correct IUPAC name of the structure is 4-ethyl-2-hydroxy-3-propylhex-3-en-5-ynoic acid