Question

part a
hc≡c−ch₂−ch₂−ch₃
spell out the full name of the compound.

Explanation:

Step1: Determine the parent chain

The parent chain is the longest continuous carbon chain containing the triple bond. Here, the parent chain has 5 carbon atoms, so the base name is "pentyne".

Step2: Locate the triple bond

The triple bond is between the first and second carbon atoms. According to IUPAC naming rules, we number the chain from the end closest to the triple bond. So, it is "1 - pentyne".

Answer:

1 - pentyne