Question 1

Complete the following Newman projection so that it represents (2R,3S)-2,3-butanediol.

Accepted Answer

The answer of Complete the following Newman projection so that...

Question 2

Which of the following compounds is/are chiral?

Accepted Answer

A)   only 1
B)   only 1 and 2
C)   only 2 and 3
D)   1, 2 and 3E) A) and B)
F) All of the above

Question 3

A mixture containing 0.50 mmol of each enantiomer is called a ___________mixture.

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Question 4

What mass of (S)-(-)-mandelic acid is present in a 10 g sample which has an enantiomeric excess of 30% of the S-enantiomer?

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Question 5

Complete the following Newman projection so that it represents (2S,3S)-2,3-butanediol.

Accepted Answer

The answer of Complete the following Newman projection so that...

Question 6

How many stereoisomers of 2,4-pentanediol, CH3CH(OH) CH2CH(OH) CH3, exist?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) None of the above

Question 7

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Accepted Answer

A)   −COOH
B)   −CHO
C)   −CH2OH
D)   −CH3E) A) and B)
F) A) and C)

Question 8

What is the configuration of the two chiral centers in the following molecule?

Accepted Answer

A)   3R,5R
B)   3R,5S
C)   3S,5R
D)   3S,5SE) None of the above
F) A) and D)

Question 9

The following two compounds represent a pair of enantiomers.

Accepted Answer

A) True 
 B)False

Question 10

A solution containing 0.04 g/mL of a pure S enantiomer in a 1 dm polarimeter rotates plane polarized light by +2°. What is the specific rotation of the R isomer?

Accepted Answer

A)   −50°
B)   −20°
C)   +10°
D)   +50°E) A) and B)
F) C) and D)

Question 11

The process that separates enantiomers is called ______________.

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Question 12

Complete the following Fischer diagram so that it represents (2R,3R)-butane-2,3-diol.

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Question 13

Which of the following have the S configuration?

Accepted Answer

A)   only 1
B)   only 2
C)   only 1 and 2
D)   1, 2 and 3E) A) and B)
F) A) and C)

Question 14

For the compound shown below the number of chiral stereoisomers that can be drawn is_____.
CH3CHClCHBrCH3

Accepted Answer

Question 15

What is "X" in the following structure? ​

Accepted Answer

A)   Inversion center
B)   Plane of symmetry
C)   Center of symmetry
D)   Point of symmetryE) None of the above
F) A) and B)

Question 16

Which of the following structures represent the same stereoisomer?

Accepted Answer

A)   only 1 and 2
B)   only 1 and 3
C)   only 2 and 3
D)   1, 2 and 3E) B) and C)
F) None of the above

Question 17

The number of chiral centers in progesterone (shown below) is ______.

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The answer of The number of chiral centers in progesterone...

Question 18

How many stereoisomers of 2,3-butanediol, CH3CH(OH) CH(OH) CH3, exist?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) C) and D)

Question 19

The following structures depicts (__)-3-ethyl-2,3-dimethylhexane.

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The answer of The following structures depicts (__)-3-ethyl-2,3-dimethylhexane. ...

Question 20

______________ are stereoisomers that are not mirror images.

Accepted Answer

Diastereom...

Exam 3: Stereoisomerism and Chirality

The following structures depicts (__)-3-ethyl-2,3-dimethylhexane.

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What is the configuration of the two chiral centers in the following molecule?

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Which of the following structures represent the same stereoisomer?

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For the compound shown below the number of chiral stereoisomers that can be drawn is_____. CH3CHClCHBrCH3

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Which of the following have the S configuration?

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The following two compounds represent a pair of enantiomers.

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Complete the following Newman projection so that it represents (2R,3S)-2,3-butanediol.

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Complete the following Newman projection so that it represents (2S,3S)-2,3-butanediol.

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Which of the following compounds is/are chiral?

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A mixture containing 0.50 mmol of each enantiomer is called a ___________mixture.

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What mass of (S)-(-)-mandelic acid is present in a 10 g sample which has an enantiomeric excess of 30% of the S-enantiomer?

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Complete the following Fischer diagram so that it represents (2R,3R)-butane-2,3-diol.

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How many stereoisomers of 2,3-butanediol, CH3CH(OH) CH(OH) CH3, exist?

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What is "X" in the following structure? ​

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The process that separates enantiomers is called ______________.

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The number of chiral centers in progesterone (shown below) is ______.

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Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

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How many stereoisomers of 2,4-pentanediol, CH3CH(OH) CH2CH(OH) CH3, exist?

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A solution containing 0.04 g/mL of a pure S enantiomer in a 1 dm polarimeter rotates plane polarized light by +2°. What is the specific rotation of the R isomer?

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______________ are stereoisomers that are not mirror images.

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For the compound shown below the number of chiral stereoisomers that can be drawn is_____. CH₃CHClCHBrCH₃

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How many stereoisomers of 2,3-butanediol, CH₃CH(OH) CH(OH) CH₃, exist?

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What is "X" in the following structure?

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How many stereoisomers of 2,4-pentanediol, CH₃CH(OH) CH₂CH(OH) CH₃, exist?

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Diastereom...
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