Question

2 multiple choice 2 points how many secondary (2°) carbons are found in 5 - ethyl - 3,3,4 - trimethylheptane? 5 4 3 2 1 previous

Explanation:

Step1: Draw the structure

Draw the structure of 5 - ethyl - 3,3,4 - trimethylheptane. Heptane has 7 carbon atoms in the main chain. At the 3 - position, there are two methyl groups, at the 4 - position there is one methyl group and at the 5 - position there is an ethyl group.

Step2: Identify secondary carbons

A secondary carbon is bonded to two other carbon atoms. In the main - chain of heptane, the 2nd, 5th and 6th carbon atoms of the main chain are secondary carbons. The carbon atoms in the methyl and ethyl substituents are not considered as part of the main - chain secondary carbons for the purpose of counting secondary carbons in the parent - chain context.

Answer:

3