Question

What is the name of this molecule?

A. nonene
B. nonane
C. 1-octyne
D. 1-octene

Answer 1

1-Octene.

Step-by-step explanation:

1. Identify and name the longest continuous chain of carbon atoms that passes through the double bond. Replace the -ane ending of the corresponding alkane to get the base name octene.
2. Number the carbon atoms from the end closest to the double bond.
3. Locate the double bond by using the lower-numbered of its two carbon atoms. Insert the name of the locant just before the name of the functional group. Use a hyphen to connect numbers and letters.

The IUPAC name is oct-1-ene.

Note: The name 1-octene is acceptable, but the Preferred IUPAC Name puts the locants as close as possible in front of the groups they locate