Question 1

Draw the structure of (2R,3S)-dichloropentane.Take particular care to indicate three-dimensional stereochemistry detail properly.

Accepted Answer

The answer of Draw the structure of (2R,3S)-dichloropentane.Take particular care...

Question 2

Which of the following is/are optically inactive?

Accepted Answer

A) a 50-50 mixture of R and S enantiomers 
B) a meso compound 
C) every achiral compound 
D) a racemic mixture 
E) all the above 
A) a 50-50 mixture of R and S enantiomers 
B) a meso compound 
C) every achiral compound 
D) a racemic mixture 
E) all the above

Question 3

What is the relationship between the compounds below?

Accepted Answer

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

Question 4

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 5

Draw the enantiomer of the compound below.

Accepted Answer

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

Question 6

What is the relationship between the compounds below?

Accepted Answer

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

Question 7

Identify the following compounds as R or S.

Accepted Answer

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

Question 8

Provide a careful structure for (2S,3R,4R)-2-bromo-4-methyl-3-hexanol.

Accepted Answer

The answer of Provide a careful structure for (2S,3R,4R)-2-bromo-4-methyl-3-hexanol....

Question 9

If (S)-glyceraldehyde has a specific rotation of -8.7°,what is the specific rotation of (R)-glyceraldehyde?

Accepted Answer

A) -8.7° 
B) +8.7° 
C) 0)0° 
D) cannot be determined from the information given 
A) -8.7° 
B) +8.7° 
C) 0)0° 
D) cannot be determined from the information given

Question 10

Which of the following statements correctly describes the molecule shown below?

Accepted Answer

A) It is achiral. 
B) It is meso. 
C) Its asymmetric center possesses the R configuration. 
D) The mirror image of this molecule is its enantiomer. 
E) The molecule possesses enantiotopic hydrogens. 
A) It is achiral. 
B) It is meso. 
C) Its asymmetric center possesses the R configuration. 
D) The mirror image of this molecule is its enantiomer. 
E) The molecule possesses enantiotopic hydrogens.

Question 11

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 12

Is the molecule shown below chiral or achiral?

Accepted Answer

The answer of Is the molecule shown below chiral or...

Question 13

Which of the following compounds is an enantiomer of the structure below?

Accepted Answer

A)    
B)    
C)    
D) A and B 
E) It does not have an enantiomer. 
A)    
B)    
C)    
D) A and B 
E) It does not have an enantiomer.

Question 14

Label the molecule shown as chiral or achiral.

Accepted Answer

The answer of Label the molecule shown as chiral or...

Question 15

Draw a perspective formula of (2R,3S)-3-bromo-2-butanol.

Accepted Answer

The answer of Draw a perspective formula of (2R,3S)-3-bromo-2-butanol....

Question 16

What is the relationship between the following compounds?

Accepted Answer

A) superimposable without bond rotation 
B) constitutional isomers 
C) conformational isomers 
D) diastereomers 
E) enantiomers 
A) superimposable without bond rotation 
B) constitutional isomers 
C) conformational isomers 
D) diastereomers 
E) enantiomers

Question 17

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 18

Which of the following cannot exhibit chirality?

Accepted Answer

A) 2,3-dibromobutane 
B) 1,3-dibromobutane 
C) 1,2-dichlorobutane 
D) 1,4-dibromobutane 
E) 1-bromo-2-chlorobutane 
A) 2,3-dibromobutane 
B) 1,3-dibromobutane 
C) 1,2-dichlorobutane 
D) 1,4-dibromobutane 
E) 1-bromo-2-chlorobutane

Question 19

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

Accepted Answer

The answer of Provide a perspective drawing of each diastereomer...

Question 20

How many stereoisomers exist for this molecule that is the principal psychoactive constituent of marijuana?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Exam 4: Isomers: the Arrangement of Atoms in Space

Draw the structure of (2R,3S)-dichloropentane.Take particular care to indicate three-dimensional stereochemistry detail properly.

Which of the following is/are optically inactive?

What is the relationship between the compounds below?

Identify all pairs of diastereomers.

Draw the enantiomer of the compound below.

What is the relationship between the compounds below?

Identify the following compounds as R or S.

Provide a careful structure for (2S,3R,4R)-2-bromo-4-methyl-3-hexanol.

If (S)-glyceraldehyde has a specific rotation of -8.7°,what is the specific rotation of (R)-glyceraldehyde?

Which of the following statements correctly describes the molecule shown below?

What is the relationship between the following compounds?

Is the molecule shown below chiral or achiral?

Which of the following compounds is an enantiomer of the structure below?

Label the molecule shown as chiral or achiral.

Draw a perspective formula of (2R,3S)-3-bromo-2-butanol.

What is the relationship between the following compounds?

What is the relationship between the following compounds?

Which of the following cannot exhibit chirality?

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

How many stereoisomers exist for this molecule that is the principal psychoactive constituent of marijuana?

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds: Nomenclature, physical Properties, and Structure

Alkenes: Structure,nomenclature,and an Introduction to Reactivity - Thermodynamics and Kinetics

The Reactions of Alkenes - the Stereochemistry of Addition Reactions

The Reactions of Alkynes - Introduction to Multistep Synthesis

Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

Substitution and Elimination Reactions of Alkyl Halides

Reactions of Alcohols, ethers, epoxides, amines and Sulfur-Containing Compounds

Organometallic Compounds

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 Α-Carbon

Reactions of Benzene and Substituted Benzenes

More About Amines - Reactions of Heterocylic Compounds

The Organic Chemistry of Carbohydrates

Amino Acids,peptides,and Proteins

Catalysis in Organic Reactions and in Enzymatic Reactions

The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

The Organic Chemistry of the Metabolic Pathways

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

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