What is the correct systematic 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 parent chain here is an eight-carbon chain (oct-) with a triple bond (yne) between carbons 4 and 5. There are two substituents on carbons 3 and 6, both of which are sec-butyl groups (methylpropyl groups). Since they are both the same, we use the prefix "di-" to indicate two of them, and list them alphabetically as substituents. This gives us the name 3,6-dimethyl-4-octyne.

What Is the Correct Systematic IUPAC Name for Di-Sec-Butylacetylene