5015

Define the following terms briefly. Be specific.

(a) Configuration

(b) Constitutional isomer

(c )Unstable versus reactive species

(d) Conformation

5023

Draw a Fischer projection of all the stereoisomers of 3-phenyl-2-butanol and identify each with respect to the Cahn-Prelog notation for absolute configuration at each of the chiral centers.

5024

Draw clear stereochemical representations of both enantiomers of the compounds shown below, and illustrate the source of the chirality.

(a)

(b)

(c)

5035

Consider the chlorination of 3-methylpentane:

(a) Write a structure for all the different monochlorination products that are possible to obtained.

(b) Which pairs of isomers are enantiomers?

(c) Which pairs of isomers are diastereomers?

(d) Which isomers are achiral?

5108

Indicate whether the relationship in each of the following pairs of compounds is identical, enantiomeric, or diastereomeric:

(a)

(b)

(c)

(d)

5173

Assign R or S configuration to the chiral centers in each of the following compounds:

(a)

(b)

(c)

5196

Indicate whether the members of the pairs of structures with the same molecular formula are "equivalent" or "non-equivalent". If they are non-equivalent, indicate the nature of their isomeric relationship (enantiomers, geometric isomers, etc.):

(a)

(b)

(c)

(d)

(Continue on next page)

(e)

5206

Draw a Fischer projection of all the stereoisomers of 3-phenyl-2-butanol and identify each with respect to the Cahn-Prelog notation for absolute configuration at each of the chiral centers.

5284

Write the structure for all the isomeric dimethylcyclobutanes (C₆H₁₂) and identify each by comparison to at least one other as to whether it is constitutional, diastereomeric or enantiomeric.

5286

Assign the (R) or (S) designation to each of the following structures.

(a)

(b)

5327

Indicate whether the relationship in each of the following pairs of compounds is identical, enantiomeric, or diastereomeric:

(a)

(b)

(c)