What is the IUPAC name of the given compound?

1-Fluoro-2-chlorocyclobut-1-ene View Answer 1-Cholor-2-fluorocyclobut-1-ene 1-Chloro-2-fluorocyclobut-2-ene  2-Chloro-1-fluorocyclobut-1-ene

2-Chloro-1-fluorocyclobut-1-ene

The alkyl group is alicyclic with 4 carbon atoms at the corners of a rectangle and a double bond; hence the base is cyclobutene. In the case of cyclic alkenes, the position of double bond is always given the first number.