Question

Draw both enantiomers for each biologically active compound.

amphetamine

(a powerful central nervous stimulant)

a.

ketoprofen

(analgesic and anti-inflammatory agent)

b.

Short answer

a.

Enantiomers of amphetamine

b.

Enantiomers of ketoprofen

Step-by-step solution

Enantiomers of a given compound

A stereoisomer always has two enantiomers which are identified as the non-superimposable mirror images. The enantiomers are not identical to each other.

The two enantiomers of any compound are always different and remain different compounds even if the orientation of the molecule is changed.

To draw the enantiomers of the given compounds

The enantiomers of the given compounds can be drawn by the following steps:

• In the given structure, locate the carbon atom, which is bonded to four different groups.
• At the stereogenic center, two bonds are drawn in the plane of the page, which is represented by the normal lines.
• One bond is drawn in front of the plane of the page, represented by the wedge.
• One bond is drawn in the back of the plane of the page, represented by the dashed line.
• Then the mirror image of the molecule is drawn. The mirror image gives the other enantiomer.

Enantiomers of the given compounds

a. The enantiomers of the compound amphetamine are drawn as shown in the following diagram:

Enantiomers of amphetamine

b. The enantiomers of the compound ketoprofen are drawn as shown in the following diagram:

Enantiomers of ketoprofen