Question

question 4 (1 point) which is the least stable conformation of 3 - methyl - 1 - butanol?

Explanation:

Step1: Understand stability principle

The least - stable conformation of a molecule usually has the most steric hindrance or unfavorable interactions. In the case of 3 - methyl - 1 - butanol, the gauche interaction between the methyl group and the hydroxyl group causes steric repulsion.

Step2: Analyze each option

The conformation with the methyl and hydroxyl groups in close proximity (gauche position) will be the least stable. This is because the non - bonding electron clouds of the methyl and hydroxyl groups repel each other.

Answer:

The conformation where the methyl group and the hydroxyl group are in the gauche position (causing steric strain) is the least stable. Without specific labels for the options, it's not possible to point out a letter - labeled answer, but look for the structure where the methyl and the hydroxyl are close to each other in a non - staggered way.