Question

identify the name of carboxylic acid shown below:
select the correct answer below:
○ 2 - chloro - 3 - methylbutanoic acid.
○ 1 - chloro - 3 - methylbutanoic acid
○ 3 - chloro - 2 - methylbutanoic acid
○ 1 - chloro - 2 - methylbutanoic acid

Explanation:

Step1: Determine the parent chain

The parent chain is butanoic acid (4 - carbon chain with a carboxylic acid group).

Step2: Number the carbon atoms

Number the carbon atoms starting from the carboxylic acid carbon (\(C = O\) carbon is \(C - 1\)).

Step3: Identify substituents and their positions

• There is a chlorine (\(Cl\)) atom on \(C - 3\).
• There is a methyl (\(-CH_3\)) group on \(C - 2\).

Answer:

3 - chloro - 2 - methylbutanoic acid.