What is the correct systematic name for the following alkene?
A) 2-ethyl-3-methyl-2-hexene
B) 2-ethyl-3-methyl-1-pentene
C) 4-ethyl-3-methyl-4-pentene
D) 3-methyl-4-ethyl-4-pentene
E) octene

Question

What is the correct systematic name for the following alkene? 
A) 2-ethyl-3-methyl-2-hexene 
B) 2-ethyl-3-methyl-1-pentene 
C) 4-ethyl-3-methyl-4-pentene 
D) 3-methyl-4-ethyl-4-pentene 
E) octene

Quizplus · Accepted Answer

The longest chain contains 6 carbons, so the parent name is hexene. The double bond starts on the second carbon from the left, so the double bond is between carbons 2 and 3. The alkyl groups on carbons 3 and 4 are both ethyl and methyl, respectively. Therefore, the systematic name is 2-ethyl-3-methyl-1-pentene.

What Is the Correct Systematic Name for the Following Alkene