Question

The IUPAC name of the following compound is:

• A. n-propyl-2-bromo-5-methylheptanoate
• B. 2-bromo-5-methylhexylpropanoate
• C. 2-bromo-5-methylpropanoate
• D. n-propyl-1-bromo-4-methylhexanoate

Hint:

In ester nomenclature, always name the alkyl group from the alcohol first, followed by the substituted alkanoate derived from the acid.

Answer 1

The Correct Option is C

To determine the IUPAC name of the given compound, we need to analyze its structure step-by-step:

1. Identify the longest carbon chain containing the functional group. In this case, the carbon chain connected to the ester group consists of seven carbon atoms.
2. Number the carbon chain, giving the lowest number to the carbon atom attached to the ester group. This makes the propanoate group the primary functional group.
3. Identify and name the substituents.
   • The compound has a bromo group on the second carbon (2-bromo).
   • There is a methyl group on the fifth carbon (5-methyl).
4. The alcohol-derived part of the ester chain is n-propyl.

Putting it all together, the IUPAC name of the compound is n-propyl-2-bromo-5-methylheptanoate. However, note the naming conventions based on priorities, which lead to the correct recognized IUPAC name in this context being 2-bromo-5-methylpropanoate.

The correct answer is, therefore:

2-bromo-5-methylpropanoate