CH₃C ≡ CCH₂CH₂Cl is named A)1-chloro-3-pentyne. B)5-chloro-2-pentyne. C)5-chloro-2-pentene. D)1-acetylenyl-3-chloropropane. E)1-chloro-3-pentene.

Question

Quizplus · Accepted Answer

The compound has a triple bond (indicating a -yne suffix) and a chlorine substituent. The longest carbon chain that includes the triple bond has 5 carbons, making it a "pentyne". The chlorine is on the 5th carbon (when numbering from the end closest to the triple bond to get the lowest possible numbers), and the triple bond starts at the 2nd carbon, hence "5-chloro-2-pentyne".

CH3C ≡ CCH2CH2Cl Is Named

CH₃C ≡ CCH₂CH₂Cl Is Named