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

Step3: Locate substituents

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

Step4: Name the compound

According to IUPAC rules, we name the substituents in alphabetical order (chloro comes before methyl). So the name is 3 - chloro - 2 - methylbutanoic acid.

Answer:

3-chloro-2-methylbutanoic acid