Question

Which is the wrong IUPAC name of chlorocyclohexane-dione?

• A. 3-Chloro-1,4-cyclohexanedione
• B. 2-Chloro-1, 3-cyclohexanedione
• C. 4-Chloro-1,3-cyclohexanedione
• D. 5-Chloro-1,3-cyclohexanedione

Answer 1

The correct option is A 3-Chloro-1,4-cyclohexanedione

Position of chlorine is incorrectly mentioned. It is correctly written as:

Parent chain is cyclohexane ring.
-X (F, Cl, Br, I) do not have any priority order and considered as alkyl substituents while numbering

Ketones ( >C=O )
Suffix: one

The correct IUPAC name is 2-Chloro-1,4-cyclohexanedione