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R,S Chirality

Total questions: 7

Worksheet time: 4mins

Name
Class
Date
1.

Chirality...

a)

... is a property of a molecule, not a mixture

b)

... can be quantified by measuring optical rotation

c)

... requires a molecule with a chiral centre

d)

... can only be observed at a molecular level

2.

How can you prove if a novel enantiopure compound has R or S configuration?

a)

Derivatising (e.g. Mosher's ester) then 1H NMR

b)

Measuring [α]D

c)

Chiral HPLC

d)

X-ray crystallography

3.

How many possible stereoisomers does Baulamycin have? (7 stereocentres)

a)

7

b)

14

c)

49

d)

128

4.

How many possible stereoisomers does tartaric acid have?

a)

1

b)

2

c)

3

d)

4

5.

Two enantiomers will have the same...

a)

IC50

b)

Solubility

c)

Microsomal clearance

d)

In vivo PK

6.

This reaction is...

a)

Asymmetric

b)

Stereospecific

c)

Stereoselective

d)

None of the above

7.

What is the difference between a chiral ligand and a chiral auxiliary?

a)

The chiral auxiliary is made from the chiral pool

b)

The chiral ligand is used catalytically

c)

The chiral auxiliary is covalently bound to the starting material

d)

None are correct