Question

What is the correct IUPAC name of the following compound?

• A. Cyclopentaneethenyl chloride
• B. Cyclopentanecarbonyl chloride
• C. Cyclopentenecarbonyl chloride
• D. Cyclopenteneethenyl chloride

Answer 1

The correct option is B Cyclopentanecarbonyl chloride

Theory :

Acid Halides ( −COX ) : Suffix: −oyl halide is used when −COX group is a part of the parent chain.

Acid Halides ( −COX ) :
Suffix: −carbonyl halide is used when −COX group is not a part of the parent chain.


In the given compound suffix carbonyl halide is used as the 5 mebered cyclic carbon ring is the parent chain.
So, the correct IUPAC name of the compound is Cyclopentanecarbonyl chloride