Which of the following is an acceptable structure for 3-sec-butyl-1-heptyne?
A)I
B)II
C)III
D)IV

Question

Which of the following is an acceptable structure for 3-sec-butyl-1-heptyne? 
A)I 
B)II 
C)III 
D)IV

Quizplus · Accepted Answer

The root chain should contain seven carbon atoms to match the heptyne suffix. The substituent on the third carbon atom should be a butyl group, which is represented by "3-sec-butyl-". The alkyne functional group should be on the first carbon atom of the chain, hence "1-heptyne". Choice B correctly represents this structure by placing the substituent and functional group prefixes in alphabetical order and arranging them so that the functional group comes first in the name.

Which of the Following Is an Acceptable Structure for 3-Sec-Butyl-1-Heptyne