Question

question 10 - 1 point
how many carbons are there in the main chain of the carboxylic acid 3 - methyl - 2 - propyl hexanoic acid?
provide your answer below:

Explanation:

Step1: Analyze the root name

The root name is "hexanoic acid". In IUPAC naming of carboxylic acids, the root name indicates the number of carbons in the main chain. But wait, there is a propyl substituent. When naming carboxylic acids, we consider the longest chain that includes the -COOH group. Here, the propyl group (3 carbons) is attached in a way that when combined with the original chain (hex - 6 carbons, but the correct main chain is longer). Let's count properly. The -COOH carbon is part of the main chain. The name 3 - methyl - 2 - propyl hexanoic acid: the main chain is -COOH - C - C (from propyl) - C - C - C - C - C - C. So in total, 9 carbons.

Answer:

9