Which of the following alkanes is most likely to form a minor product in the isomerization reaction with anhydrous aluminum chloride and hydrogen chloride gas?

Step-by-step solution

In the isomerization reaction with anhydrous aluminum chloride and hydrogen chloride gas, the formation of minor products is more likely to occur when there are branching or substitution on the alkane chain. 2-Methylpentane is a branched-chain alkane and is more likely to undergo isomerization, leading to minor products.