Concept:A haloalkyne is an alkyne that contains a carbon-carbon triple bond and a halogen atom
(X) attached to the carbon chain.
Explanation:Check each option for the presence of a
−C≡C− triple bond.
Option A:
CH3−CH2−CH=CH−X has a double bond, not a triple bond, so it is a haloalkene.
Option B:
CH3−C≡C−CH2−X contains a triple bond, so it is a haloalkyne.
Option C:
CH≡C−CH2−CH2−X contains a triple bond, so it is a haloalkyne.
Option D:
CH3−CH2−C≡C−X contains a triple bond, so it is a haloalkyne.
Therefore, the compound that is not a haloalkyne is option A.
Answer:Option A:
CH3−CH2−CH=CH−X