Question

consider the hydrocarbon below. what is the name of this hydrocarbon? 1 - ethyne 1 - pentyne 1 - ethane 1 - butyne

Explanation:

Count the number of carbon - atoms in the longest chain. The molecule has a triple bond and 5 carbon - atoms in the longest chain. According to IUPAC naming rules for alkynes, a 5 - carbon alkyne is named pentyne. The triple bond is at the first carbon, so it is 1 - pentyne.

Answer:

B. 1 - pentyne