Question 1

The configuration of R-(+)-glyceraldehyde is as follows:   What is the absolute configuration of (-)-lactic acid?

Accepted Answer

A) R configuration 
B) L configuration 
C) S configuration 
D) R and S configuration 
E) D and L configuration 
A) R configuration 
B) L configuration 
C) S configuration 
D) R and S configuration 
E) D and L configuration A

Question 2

Indicate whether each of the following structures has the R or S configuration. What is the relationship between the two structures?

Accepted Answer

Therefore, the two compounds are enantiomers.

Question 3

Label each asymmetrical carbon in the compound below as R or S.

Accepted Answer

The answer of Label each asymmetrical carbon in the compound...

Question 4

Briefly describe how two enantiomers might be separated.

Accepted Answer

The two compounds can be converted to di

Question 5

Identify the compounds that have an asymmetric center.

Accepted Answer

A) A 
B) B 
C) C 
D) A and B 
E) A, B, and C 
A) A 
B) B 
C) C 
D) A and B 
E) A, B, and C

Question 6

Provide a perspective drawing of the enantiomer of (2R,3S)-1,2,3-trichloropentane.

Accepted Answer

The answer of Provide a perspective drawing of the enantiomer...

Question 7

A newly isolated natural product was shown to be optically active. If a solution of 2.0 g in 10 mL of ethanol in a 50 cm tube gives a rotation of +2.57°, what is the specific rotation of this natural product?

Accepted Answer

The answer of A newly isolated natural product was shown...

Question 8

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Accepted Answer

The answer of Which of the following terms best describes...

Question 9

Provide a careful structure for (2S,3S)-2,3-dibromohexane.

Accepted Answer

The answer of Provide a careful structure for (2S,3S)-2,3-dibromohexane....

Question 10

Identify the following compounds as R or S.

Accepted Answer

A) S, S, R 
B) S, R, S 
C) R, S, S 
D) S, S, S 
E) R, R, R 
A) S, S, R 
B) S, R, S 
C) R, S, S 
D) S, S, S 
E) R, R, R

Question 11

Draw the enantiomer of the compound below.

Accepted Answer

The answer of Draw the enantiomer of the compound below....

Question 12

Draw any diastereomer of (2R,3R)-2,3-dichloropentane. Be careful to indicate proper stereochemistry.

Accepted Answer

The answer of Draw any diastereomer of (2R,3R)-2,3-dichloropentane. Be careful...

Question 13

How many asymmetric centers are present in a molecule of 2,4,6-trimethylheptane?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 14

Identify all pairs of diastereomers.

Accepted Answer

A) B and D, A and C 
B) A and C 
C) B and D 
D) A and B, A and D, B and C, C and D 
E) B and D, A and B, A and D, B and C, C and D 
A) B and D, A and C 
B) A and C 
C) B and D 
D) A and B, A and D, B and C, C and D 
E) B and D, A and B, A and D, B and C, C and D

Question 15

What is the relationship between the following compounds?

Accepted Answer

A) enantiomers 
B) diastereomers 
C) constitutional isomers 
D) conformational isomers 
E) identical compounds 
A) enantiomers 
B) diastereomers 
C) constitutional isomers 
D) conformational isomers 
E) identical compounds

Question 16

Choose the enantiomer of the compound below.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 17

How many asymmetric centers are present in the compound shown below?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 18

Draw the stereoisomers of 1,3-dichlorocyclopentane.

Accepted Answer

The answer of Draw the stereoisomers of 1,3-dichlorocyclopentane....

Question 19

Identify the pair of compounds.

Accepted Answer

A) identical 
B) conformation isomers 
C) constitutional isomers 
D) configurational isomers 
E) none of the above 
A) identical 
B) conformation isomers 
C) constitutional isomers 
D) configurational isomers 
E) none of the above

Question 20

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Accepted Answer

The answer of Which of the following terms best describes...

Exam 4: Isomers: the Arrangement of Atoms in Space

The configuration of R-(+)-glyceraldehyde is as follows: What is the absolute configuration of (-)-lactic acid?

Indicate whether each of the following structures has the R or S configuration. What is the relationship between the two structures?

Label each asymmetrical carbon in the compound below as R or S.

Briefly describe how two enantiomers might be separated.

Identify the compounds that have an asymmetric center.

Provide a perspective drawing of the enantiomer of (2R,3S)-1,2,3-trichloropentane.

A newly isolated natural product was shown to be optically active. If a solution of 2.0 g in 10 mL of ethanol in a 50 cm tube gives a rotation of +2.57°, what is the specific rotation of this natural product?

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Provide a careful structure for (2S,3S)-2,3-dibromohexane.

Identify the following compounds as R or S.

Draw the enantiomer of the compound below.

Draw any diastereomer of (2R,3R)-2,3-dichloropentane. Be careful to indicate proper stereochemistry.

How many asymmetric centers are present in a molecule of 2,4,6-trimethylheptane?

Identify all pairs of diastereomers.

What is the relationship between the following compounds?

Choose the enantiomer of the compound below.

How many asymmetric centers are present in the compound shown below?

Draw the stereoisomers of 1,3-dichlorocyclopentane.

Identify the pair of compounds.

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Reactions of Alkynes Introduction to Multistep Synthesis

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

Mass Spectrometry, Infrared Spectroscopy, and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Nucleosides, Nucleotides, and Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

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