What is the IUPAC name for di-sec-butylacetylene?
A) 2-ethyl-5-methyl-3-heptyne
B) 2,7-dimethyl-4-octyne
C) 3,6-dimethyl-4-octyne
D) 2,5-diethyl-3-hexyne
E) 2,2,5,5-tetramethyl-3-hexyne

Question

Quizplus · Accepted Answer

The prefix "di-" indicates that there are two sec-butyl groups, which are located at the second carbon atom in the molecule. Therefore, the correct IUPAC name is 3,6-dimethyl-4-octyne. Option A refers to a different molecule with an ethyl and a methyl group, option B has two methyl groups and a longer carbon chain, option D has two ethyl groups and a shorter carbon chain, and option E has four methyl groups.

What Is the IUPAC Name for Di-Sec-Butylacetylene