Question

spell out the full name of the compound.

Explanation:

Step1: Find the longest carbon chain containing the triple bond

The longest chain has 6 carbon atoms.

Step2: Number the chain

Number from the end closer to the triple bond. The triple bond is between C - 3 and C - 4.

Step3: Name substituents

There is a methyl group at C - 2 and a methyl group at C - 5.

Step4: Name the compound

The name is 2,5 - dimethyl - 3 - hexyne.

Answer:

2,5 - dimethyl - 3 - hexyne