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Chapter 4: Q-87P (page 184)

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

Short Answer

Expert verified

a. The two structures in a are enantiomers.

b. The two structures in b are diastereomers.

Step by step solution

01

Definition of enantiomer, diastereomer, constitutional isomer

a. Identical: If a compound and its mirror image has exactly same structure,the compound is called identical.

b. Enantiomer: If a compound has a mirror image which is exactly opposite of the original compound, but don’t superimpose with each other is called enantiomers. Enantiomers also posses a plane of symmetry in a molecule.

c. Diastereomers: The compounds that has no mirror image, are non-identical and don’t superimpose with each other is known as diastereomers.

d. Constitutional isomer: The compounds that has same molecular formula but the connectivity through atoms in a bond are different and has no chiral centre are called constitutional isomers. They are also called structural isomers.

02

Explanation of the answers

Here A and B are not a mirror image, not superimposable and not same in structure.so they are diastereomers.

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Most popular questions from this chapter

Naproxen, a nonsteroidal anti-inflammatory drug that is the active ingredient in Aleve (p. 115), has a specific rotation of +66. One commercial preparation result in a mixture with a 97% enantiomeric excess.

a. Does naproxen have the R or the S configuration?

b. What percent of each enantiomer is obtained from the commercial preparation?

What is the configuration of each of the asymmetric centers in the following compounds?

Question:

a. Draw all possible stereoisomers of the following compound:

b. Which stereoisomers are optically inactive?
  1. Draw the two chair conformers for each of the stereoisomers of trans-1-tert-butyl-3-methylcyclohexane.
  2. For each pair, indicate which conformer is more stable.

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

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