1.Classify the following molecule as either chiral or achiral.

2. Classify the following molecule as either chiral or achiral.

3. Classify the following molecule as either chiral or achiral.

4. Classify the following molecule as either chiral or achiral.

5. Classify the following molecule as either chiral or achiral.

6. Determine if the structures in the following pair are enantiomers, diastereomers, constitutional isomers, or identical compounds.

7. Assign the absolute configuration of the stereogenic center in the following molecule.

a) R

b) S

8.

Assign the absolute configuration of the stereogenic centers in the following molecule.

a 2R 3s

b 2S 3S

c 2R 3S

d 2S 3R

9.

111 NH2 NH2 Br and O