Question

(+)-Carvone and (-)-carvone differ in the orientations of the substituents around which of the following carbon atoms?

A ) Carbon 2 only
B ) Carbon 5 only
C ) Carbons 2 and 5 only
D ) Carbons 2, 5, and 7 only

Answer 1

The correct option is: B. Carbon 5 only

Step-by-step explanation:

Carvone is a naturally-occurring monoterpenoid consisting of a six-membered cyclic ring. The carbon-5 of this cyclic ring of Carvone is chiral, due to which Carvone exhibits enantiomerism.

The two enantiomeric forms of Carvone are: R-(–)-carvone, or L-carvone, and S-(+)-carvone, or D-carvone.

These two enantiomeric forms differ in the orientation of the substituents on the chiral carbon-5.

Therefore, the correct option is B. Carbon 5 only.