a. Stereoisomers with two asymmetric centers are called ___ if the configuration of both asymmetric centers in one stereoisomer is the opposite of the configuration of the symmetric centers in the other stereoisomer.
b. Stereoisomers with two asymmetric centers are called ___ if the configuration of both asymmetric centers in one stereoisomer is the same as the configuration of the asymmetric centers in the other stereoisomer.
c. Stereoisomers with two asymmetric centers are called ___ if one of the asymmetric centers has the same configuration in both stereoisomers and the other asymmetric center has the opposite configuration in the two stereoisomers.

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

a.

b.

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

a.

b.

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

a.

b.

Indicate whether each of the structures in the second row is an enantiomer of, is a diastereomer of, or is identical to the structure in the top row.

Identify

5. achiral compounds

6. meso compounds

7. enantiomers

8. diastereomers

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

e.

f.

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

c.

d.

Define the relationship between each set of two molecules as chain isomers, positional isomers, functional group isomers, enantiomers, diastereomers, conformational isomers, or identical

(d)