Question

what is the name for this molecule?
ch₃
h₂c — c≡c — ch₂
h₃c
3 - heptyne
3 - heptene
3 - hexyne
3 - hexene

Explanation:

1. First, count the number of carbon - atoms in the longest carbon - chain. There are 7 carbon atoms in the given molecule, so the parent - chain is heptane.
2. Then, identify the functional group. The molecule has a triple bond (alkyne), which is indicated by the suffix - yne.
3. The triple bond is located at the 3 - position of the carbon - chain.

Answer:

A. 3 - heptyne