What is the IUPAC name of the following compound?
A) (
S)-2-hydroxycyclohexanone
B) (
R)-2-hydroxycyclohexanone
C) (
S)-1-hydroxy-2-cyclohexanone
D) (
R)-1-hydroxy-2-cyclohexanone

Question

What is the IUPAC name of the following compound? 
A) (
S)-2-hydroxycyclohexanone 
B) (
R)-2-hydroxycyclohexanone 
C) (
S)-1-hydroxy-2-cyclohexanone 
D) (
R)-1-hydroxy-2-cyclohexanone

Quizplus · Accepted Answer

The molecule has a cyclic ring with a hydroxy and ketone functional group on adjacent carbons. The IUPAC nomenclature rules require numbering the carbons in the ring so the hydroxy group has the lowest possible number. This makes the ketone group on carbon 2, and since the hydroxy group is on the same side as the lowest priority group (the hydrogen), the molecule is assigned the R configuration. Therefore, the correct name is (R)-2-hydroxycyclohexanone.

What Is the IUPAC Name of the Following Compound