Question 1

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

Accepted Answer

Question 2

The process that separates enantiomers is called ______________.

Accepted Answer

The answer of The process that separates enantiomers is called...

Question 3

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,5S 
A)  3R,5R 
B)  3R,5S 
C)  3S,5R 
D)  3S,5S

Question 4

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

Accepted Answer

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

Question 5

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)  −CH3 
A)  −COOH 
B)  −CHO 
C)  −CH2OH 
D)  −CH3

Question 6

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

Accepted Answer

The answer of What mass of (S)-(-)-mandelic acid is present...

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

The answer of A mixture containing 0.50 mmol of each...

Question 9

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

Question 10

______________ are stereoisomers that are not mirror images.

Accepted Answer

Diastereom

Question 11

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 12

The following two compounds represent a pair of enantiomers.

Accepted Answer

A) True 
 B)False

Question 13

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° 
A)  −50° 
B)  −20° 
C)  +10° 
D)  +50°

Question 14

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

Question 15

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

Question 16

What is "X" in the following structure? ​

Accepted Answer

A)  Inversion center 
B)  Plane of symmetry 
C)  Center of symmetry 
D)  Point of symmetry 
A)  Inversion center 
B)  Plane of symmetry 
C)  Center of symmetry 
D)  Point of symmetry

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

The answer of Complete the following Fischer diagram so that...

Question 19

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 20

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

Accepted Answer

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

Exam 3: Stereoisomerism and Chirality

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

The process that separates enantiomers is called ______________.

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

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

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

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

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

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

Which of the following compounds is/are chiral?

______________ are stereoisomers that are not mirror images.

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

The following two compounds represent a pair of enantiomers.

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?

Which of the following have the S configuration?

Which of the following structures represent the same stereoisomer?

What is "X" in the following structure? ​

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

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

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

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

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

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

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

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

What is "X" in the following structure?