Question 1

A mixture of equal amounts of two enantiomers ________.

Accepted Answer

A)  is called a racemic mixture 
B)  is optically inactive 
C)  implies that the enantiomers are meso forms 
D)  both A and B 
E)  none of the above 
A)  is called a racemic mixture 
B)  is optically inactive 
C)  implies that the enantiomers are meso forms 
D)  both A and B 
E)  none of the above

Question 2

Can the molecule shown below be properly described as a meso compound?
(CH3)2CHCH2CH3

Accepted Answer

Question 3

Draw the structure of (1R, 2S, 3S)-1,2-dibromo-3-ethylcyclohexane. Take particular care to indicate stereochemistry properly.

Accepted Answer

The answer of Draw the structure of (1R, 2S, 3S)-1,2-dibromo-3-ethylcyclohexane....

Question 4

Which of the following configurations corresponds to the structure below?

Accepted Answer

A)  (4R, 5R) 
B)  (4R, 5S) 
C)  (4S, 5R) 
D)  (4S, 5S) 
A)  (4R, 5R) 
B)  (4R, 5S) 
C)  (4S, 5R) 
D)  (4S, 5S)

Question 5

Can a molecule be chiral if it contains no asymmetric carbons? Explain briefly.

Accepted Answer

Yes. The presence of asymmetric carbons

Question 6

Is the molecule shown below chiral or achiral?
(CH3)3CCH(CH3)2

Accepted Answer

Question 7

If possible, draw the structure of the enantiomer of the molecule shown below.

Accepted Answer

The answer of If possible, draw the structure of the...

Question 8

The specific rotation of pure (-)-2-butanol is -13.5°. If a mixture has a specific rotation of +7°, how much of each form (+ and-) is present and what is the e.e. of the mixture?

Accepted Answer

The sample is 76% of

Question 9

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 10

Is the molecule shown below chiral or achiral?

Accepted Answer

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

Question 11

Is the molecule shown below chiral or achiral?

Accepted Answer

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

Question 12

In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.

Accepted Answer

C3 isn't a chirality center be

Question 13

Can the molecule shown below be properly described as a meso compound?

Accepted Answer

The answer of Can the molecule shown below be properly...

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

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

Question 17

If possible, draw the structure of any diastereomer of the molecule shown below.

Accepted Answer

The answer of If possible, draw the structure of any...

Question 18

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

Accepted Answer

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

Question 19

Briefly describe how two enantiomers might be separated.

Accepted Answer

The two compounds can be converted to di

Question 20

How many asymmetric carbons are present in the compound below?

Accepted Answer

The answer of How many asymmetric carbons are present in...

Exam 5: Stereochemistry

A mixture of equal amounts of two enantiomers ________.

Can the molecule shown below be properly described as a meso compound? (CH3)2CHCH2CH3

Draw the structure of (1R, 2S, 3S)-1,2-dibromo-3-ethylcyclohexane. Take particular care to indicate stereochemistry properly.

Which of the following configurations corresponds to the structure below?

Can a molecule be chiral if it contains no asymmetric carbons? Explain briefly.

Is the molecule shown below chiral or achiral? (CH3)3CCH(CH3)2

If possible, draw the structure of the enantiomer of the molecule shown below.

The specific rotation of pure (-)-2-butanol is -13.5°. If a mixture has a specific rotation of +7°, how much of each form (+ and-) is present and what is the e.e. of the mixture?

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

Is the molecule shown below chiral or achiral?

Is the molecule shown below chiral or achiral?

In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.

Can the molecule shown below be properly described as a meso compound?

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

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

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

If possible, draw the structure of any diastereomer of the molecule shown below.

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

Briefly describe how two enantiomers might be separated.

How many asymmetric carbons are present in the compound below?

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Can the molecule shown below be properly described as a meso compound? (CH₃)₂CHCH₂CH₃

Is the molecule shown below chiral or achiral? (CH₃)₃CCH(CH₃)₂