Q. The IUPAC name of the compound having the formula CH≡C–CH=CH₂ is:
A) 1-butyn-3-ene
B) but-1-yne-3-ene
C) 1-butene-3-yne
D) 3-butene-1-yne
Explanation
[Solution from source] CH₂=CH–C≡CH: numbering from the double-bond end gives the double bond at C1 and the triple bond at C3, and when locants tie the double bond gets the lower number. The name is but-1-en-3-yne, written here as 1-butene-3-yne. Names with 'yne' cited first are wrong since 'ene' precedes 'yne'. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.