Question 1

Instructions: Place asterisks at all the chirality centers in each molecule below.
-Place asterisks:   codeine

Accepted Answer

The answer of Instructions: Place asterisks at all the chirality...

Question 2

Which of the following have the R 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 D

Question 3

(-)-cholesterol

Accepted Answer

A)  does not have a chiral center. 
B)  is dextrorotatory. 
C)  rotates the plane of polarized light counterclockwise. 
D)  does not rotate polarized light. 
A)  does not have a chiral center. 
B)  is dextrorotatory. 
C)  rotates the plane of polarized light counterclockwise. 
D)  does not rotate polarized light. C

Question 4

Which of the following statements is true regarding pairs of enantiomers?

Accepted Answer

A)  They have identical melting points 
B)  They have identical boiling points. 
C)  They rotate plane-polarized light in opposite directions 
D)  They produce different products in reactions with chiral reagents 
E)  all of these 
A)  They have identical melting points 
B)  They have identical boiling points. 
C)  They rotate plane-polarized light in opposite directions 
D)  They produce different products in reactions with chiral reagents 
E)  all of these

Question 5

Match each definition to a term from the list below.
-Describes an sp3-hybridized atom that can become a chirality center by changing one of its attached groups.

Accepted Answer

A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive 
A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive

Question 6

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 7

Instructions: Place asterisks at all the chirality centers in each molecule below.
-Place asterisks:   ephedrine

Accepted Answer

The answer of Instructions: Place asterisks at all the chirality...

Question 8

Match each definition to a term from the list below.
-Are molecules which contain both chirality centers and a plane of symmetry.

Accepted Answer

A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive 
A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive

Question 9

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 10

Which of the following correctly describes a molecule that is achiral?

Accepted Answer

A)  Non-superimposability of the molecule on its mirror image 
B)  Superimposability of the molecule on its mirror image 
C)  Contains a carbon atom with four different substituents 
D)  Does not have a plane of symmetry 
E)  Both b and d 
A)  Non-superimposability of the molecule on its mirror image 
B)  Superimposability of the molecule on its mirror image 
C)  Contains a carbon atom with four different substituents 
D)  Does not have a plane of symmetry 
E)  Both b and d

Question 11

Instructions: Consider the structure of streptimidone below to answer the following question(s).   streptimidone
-Refer to instructions. Assign R or S configuration to each chirality center indicated in streptimidone.

Accepted Answer

The answer of Instructions: Consider the structure of streptimidone below...

Question 12

Instructions:
Refer to the structure below to answer the following questions.  
-Refer to instructions. (S)-(-)-Serine:

Accepted Answer

A)  is dextrorotatory 
B)  rotates plane-polarized light in a counterclockwise direction 
C)  rotates plane-polarized light in a clockwise direction 
D)  is racemic 
A)  is dextrorotatory 
B)  rotates plane-polarized light in a counterclockwise direction 
C)  rotates plane-polarized light in a clockwise direction 
D)  is racemic

Question 13

Match each definition to a term from the list below.
-Is an atom in a molecule that is bonded to four different atoms or groups of atoms.

Accepted Answer

A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive 
A) racemates 
B) chirality center 
C) chirality 
D) diastereomers 
E) enantiomers
F)meso compounds
G)optically active
H)prochirality center
I)optically inactive
J)achiral
K)chirality center or meso compounds
L)enantiomers or optically active
M)optically active or optically inactive

Question 14

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow.  
-Refer to instructions. The configuration of the carbon atom labeled 19 is _____.

Accepted Answer

The answer of Instructions: In the molecules below, assign R,...

Question 15

Which of the following structures contain a plane of symmetry?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  All three contain a plane of symmetry 
A)  1 
B)  2 
C)  3 
D)  All three contain a plane of symmetry

Question 16

Instructions:
Refer to the structure below to answer the following questions.  
-Refer to instructions. Draw the enantiomer of (S)-(-)-serine in a wedge-dash projection.

Accepted Answer

The answer of Instructions:
Refer to the structure below to answer...

Question 17

Instructions: Place asterisks at all the chirality centers in each molecule below.
-Rank the following substituent groups from highest to lowest priority according to the sequencing rules.
CO2CH3,CO2H,OH,Cl

Accepted Answer

Cl > OH >

Question 18

How many stereoisomers of 3-bromo-2-butanol exist?

Accepted Answer

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

Question 19

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow.  
-Refer to instructions. The configuration of the carbon atom labeled 20 is _____.

Accepted Answer

The answer of Instructions: In the molecules below, assign R,...

Question 20

The numbers on the carbon center of the following molecule represent atomic numbers.   The molecule is in

Accepted Answer

A)  the R configuration. 
B)  the S configuration. 
C)  The carbon is not a chiral center in this molecule. 
D)  The exact configuration cannot be determined without knowing additional atomic numbers. 
A)  the R configuration. 
B)  the S configuration. 
C)  The carbon is not a chiral center in this molecule. 
D)  The exact configuration cannot be determined without knowing additional atomic numbers.

Instructions: Place asterisks at all the chirality centers in each molecule below. -Place asterisks: codeine

Which of the following have the R configuration?

(-)-cholesterol

Which of the following statements is true regarding pairs of enantiomers?

Match each definition to a term from the list below. -Describes an sp³-hybridized atom that can become a chirality center by changing one of its attached groups.

Which of the following structures represent the same stereoisomer?

Instructions: Place asterisks at all the chirality centers in each molecule below. -Place asterisks: ephedrine

Match each definition to a term from the list below. -Are molecules which contain both chirality centers and a plane of symmetry.

Which of the following have the S configuration?

Which of the following correctly describes a molecule that is achiral?

Instructions: Consider the structure of streptimidone below to answer the following question(s). streptimidone -Refer to instructions. Assign R or S configuration to each chirality center indicated in streptimidone.

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. (S)-(-)-Serine:

Match each definition to a term from the list below. -Is an atom in a molecule that is bonded to four different atoms or groups of atoms.

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. -Refer to instructions. The configuration of the carbon atom labeled 19 is _____.

Which of the following structures contain a plane of symmetry?

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. Draw the enantiomer of (S)-(-)-serine in a wedge-dash projection.

Instructions: Place asterisks at all the chirality centers in each molecule below. -Rank the following substituent groups from highest to lowest priority according to the sequencing rules. CO₂CH₃,CO₂H,OH,Cl

How many stereoisomers of 3-bromo-2-butanol exist?

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. -Refer to instructions. The configuration of the carbon atom labeled 20 is _____.

The numbers on the carbon center of the following molecule represent atomic numbers. The molecule is in

Structure and Bonding:acids and Bases

Alkanes: the Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Structure Determination

Biomolecules: Carbohydrates

Biomolecules: Amino Acids, Peptides, and Proteins

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Exam 6: Sterechemistry at Tetrahedral Centers

Instructions: Place asterisks at all the chirality centers in each molecule below. -Place asterisks: codeine

Which of the following have the R configuration?

(-)-cholesterol

Which of the following statements is true regarding pairs of enantiomers?

Match each definition to a term from the list below. -Describes an sp3-hybridized atom that can become a chirality center by changing one of its attached groups.

Which of the following structures represent the same stereoisomer?

Instructions: Place asterisks at all the chirality centers in each molecule below. -Place asterisks: ephedrine

Match each definition to a term from the list below. -Are molecules which contain both chirality centers and a plane of symmetry.

Which of the following have the S configuration?

Which of the following correctly describes a molecule that is achiral?

Instructions: Consider the structure of streptimidone below to answer the following question(s). streptimidone -Refer to instructions. Assign R or S configuration to each chirality center indicated in streptimidone.

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. (S)-(-)-Serine:

Match each definition to a term from the list below. -Is an atom in a molecule that is bonded to four different atoms or groups of atoms.

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. -Refer to instructions. The configuration of the carbon atom labeled 19 is _____.

Which of the following structures contain a plane of symmetry?

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. Draw the enantiomer of (S)-(-)-serine in a wedge-dash projection.

Instructions: Place asterisks at all the chirality centers in each molecule below. -Rank the following substituent groups from highest to lowest priority according to the sequencing rules. CO2CH3,CO2H,OH,Cl

How many stereoisomers of 3-bromo-2-butanol exist?

Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. -Refer to instructions. The configuration of the carbon atom labeled 20 is _____.

The numbers on the carbon center of the following molecule represent atomic numbers. The molecule is in

Structure and Bonding:acids and Bases

Alkanes: the Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Structure Determination

Biomolecules: Carbohydrates

Biomolecules: Amino Acids, Peptides, and Proteins

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Match each definition to a term from the list below. -Describes an sp³-hybridized atom that can become a chirality center by changing one of its attached groups.

Instructions: Place asterisks at all the chirality centers in each molecule below. -Rank the following substituent groups from highest to lowest priority according to the sequencing rules. CO₂CH₃,CO₂H,OH,Cl