DAT - Dental Admission Organic Chemistry: Stereochemistry Questions and Answers

Question 1

A compound has a specific rotation of +32°. What would be the specific rotation of its enantiomer?

Accepted Answer

-32°

Answer

0°

Answer

+32°

Answer

It cannot be determined from the information given.

Question 2

Which of the following terms best describes the relationship between (2R,3S)-2,3-dibromobutane and (2S,4R)-2,4-dichloropentane?

Accepted Answer

Constitutional isomers

Answer

Enantiomers

Answer

Diastereomers

Answer

Identical compounds

Question 3

What is the maximum number of stereoisomers possible for a molecule with the structure of 3,4-dimethylhexane?

Accepted Answer

4

Answer

2

Answer

3

Answer

8

Question 4

Which of the following molecules is a meso compound?

Accepted Answer

(2R,3S)-Tartaric acid

Answer

(2R,3R)-Tartaric acid

Answer

trans-1,2-Dimethylcyclopropane

Answer

(S)-2-Butanol

Question 5

A 50:50 mixture of two enantiomers is known as what?

Accepted Answer

A racemic mixture

Answer

A diastereomeric mixture

Answer

A constitutional isomer

Answer

An optically active solution

Question 6

What is the absolute configuration (R/S) of the chiral center in (S)-2-chlorobutane?

Accepted Answer

S

Answer

R

Answer

E

Answer

Z