Question 1

Match each definition to a term from the list below.
-Are stereoisomers that are not mirror images.

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 2

Instructions: Consider the structure of streptimidone below to answer the following question(s).   streptimidone
-Refer to instructions. Does streptimidone have a meso stereoisomer? Explain.

Accepted Answer

No
Meso compounds are compounds that con

Question 3

What is the relationship between the following pair of structures?

Accepted Answer

A)  They are enantiomers 
B)  They are diastereomers 
C)  The are constitutional isomers 
D)  They are identical 
A)  They are enantiomers 
B)  They are diastereomers 
C)  The are constitutional isomers 
D)  They are identical

Question 4

Match each definition to a term from the list below.

-Describes organic molecules which rotate plane-polarized light.

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 5

What is the relationship between the following pair of structures?

Accepted Answer

A)  They are enantiomers 
B)  They are diastereomers 
C)  The are constitutional isomers 
D)  They are identical 
A)  They are enantiomers 
B)  They are diastereomers 
C)  The are constitutional isomers 
D)  They are identical

Question 6

If (+)-sucrose has a specific rotation of +66.47, what is the specific rotation of -)-sucrose?

Accepted Answer

A)  +66.47 
B)  -66.47 
C)  +33.43 
D)  -33.43 
E)  Must be determined with a polarimeter. 
A)  +66.47 
B)  -66.47 
C)  +33.43 
D)  -33.43 
E)  Must be determined with a polarimeter.

Question 7

Match each definition to a term from the list below.
-Are designated either (±) or d,l.

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 8

Which of the following is the definition of a meso compound?

Accepted Answer

A)  A molecule with chirality centers which is chiral 
B)  A molecule with chirality centers which is not chiral 
C)  A diastereomer with no chirality centers 
D)  A chiral compound with more than one chirality center 
A)  A molecule with chirality centers which is chiral 
B)  A molecule with chirality centers which is not chiral 
C)  A diastereomer with no chirality centers 
D)  A chiral compound with more than one chirality center

Question 9

The biological importance of enantiomers arises from?

Accepted Answer

A) Biological reactions involve receptor molecules. 
B) Biological receptors are chiral. 
C) Biological receptors require a specific enantiomer for reaction. 
D) Each enantiomer has different biological properties. 
E) all of these 
A) Biological reactions involve receptor molecules. 
B) Biological receptors are chiral. 
C) Biological receptors require a specific enantiomer for reaction. 
D) Each enantiomer has different biological properties. 
E) all of these

Question 10

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

Accepted Answer

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

Question 11

A natural product having [$\alpha$]D = +40.3° has been isolated and purified. This information indicates that the natural product:

Accepted Answer

A)  is racemic. 
B)  does not rotate plane-polarized light. 
C)  is levorotatory. 
D)  is dextrorotatory. 
A)  is racemic. 
B)  does not rotate plane-polarized light. 
C)  is levorotatory. 
D)  is dextrorotatory.

Question 12

Which of the following is the definition of a pair of diastereomers?

Accepted Answer

A)  A pair of structures that are superimposable mirror images of one another 
B)  A pair of stereoisomers that are non-superimposable mirror images of one another 
C)  A pair of stereoisomers that are not mirror images of one another 
D)  A pair of stereoisomers that have equal specific rotations 
A)  A pair of structures that are superimposable mirror images of one another 
B)  A pair of stereoisomers that are non-superimposable mirror images of one another 
C)  A pair of stereoisomers that are not mirror images of one another 
D)  A pair of stereoisomers that have equal specific rotations

Question 13

Instructions:
Refer to the structure below to answer the following questions.  
-Refer to instructions. Give the complete name of the enantiomer of (S)-(-)-serine.

Accepted Answer

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

Question 14

Which of the following physical properties can be used to identify a compound?

Accepted Answer

A)  R 
B)  S 
C)  ($\alpha$) 
D)  ([$\alpha$]
D)  
A)  R 
B)  S 
C)  ($\alpha$) 
D)  ([$\alpha$]
D)

Question 15

Which of the following compounds is (are) achiral?

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 16

How many stereoisomers of 3-chloro-2-methylbutane exist?

Accepted Answer

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

Question 17

Which of the following is the definition of a pair of enantiomers?

Accepted Answer

A)  A pair of structures that are superimposable mirror images of one another 
B)  A pair of stereoisomers that are non-superimposable mirror images of one another 
C)  A pair of stereoisomers that are not mirror images of one another 
D)  A pair of stereoisomers that have equal specific rotations 
A)  A pair of structures that are superimposable mirror images of one another 
B)  A pair of stereoisomers that are non-superimposable mirror images of one another 
C)  A pair of stereoisomers that are not mirror images of one another 
D)  A pair of stereoisomers that have equal specific rotations

Question 18

Which of the following has a plane of symmetry?

Accepted Answer

A)  boot 
B)  laboratory beaker 
C)  hammer 
D)  both b and c 
E)  none of these 
A)  boot 
B)  laboratory beaker 
C)  hammer 
D)  both b and c 
E)  none of these

Question 19

How many stereoisomers of 2,3-dimethylbutane exist?

Accepted Answer

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

Match each definition to a term from the list below. -Are stereoisomers that are not mirror images.

Instructions: Consider the structure of streptimidone below to answer the following question(s). streptimidone -Refer to instructions. Does streptimidone have a meso stereoisomer? Explain.

What is the relationship between the following pair of structures?

Match each definition to a term from the list below. -Describes organic molecules which rotate plane-polarized light.

What is the relationship between the following pair of structures?

If (+)-sucrose has a specific rotation of +66.47, what is the specific rotation of -)-sucrose?

Match each definition to a term from the list below. -Are designated either (±) or d,l.

Which of the following is the definition of a meso compound?

The biological importance of enantiomers arises from?

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

A natural product having [ $\alpha$ ]_D = +40.3° has been isolated and purified. This information indicates that the natural product:

Which of the following is the definition of a pair of diastereomers?

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. Give the complete name of the enantiomer of (S)-(-)-serine.

Which of the following physical properties can be used to identify a compound?

Which of the following compounds is (are) achiral?

How many stereoisomers of 3-chloro-2-methylbutane exist?

Which of the following is the definition of a pair of enantiomers?

Which of the following has a plane of symmetry?

How many stereoisomers of 2,3-dimethylbutane exist?

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

Match each definition to a term from the list below. -Are stereoisomers that are not mirror images.

Instructions: Consider the structure of streptimidone below to answer the following question(s). streptimidone -Refer to instructions. Does streptimidone have a meso stereoisomer? Explain.

What is the relationship between the following pair of structures?

Match each definition to a term from the list below. -Describes organic molecules which rotate plane-polarized light.

What is the relationship between the following pair of structures?

If (+)-sucrose has a specific rotation of +66.47, what is the specific rotation of -)-sucrose?

Match each definition to a term from the list below. -Are designated either (±) or d,l.

Which of the following is the definition of a meso compound?

The biological importance of enantiomers arises from?

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

A natural product having [ α\alphaα ]D = +40.3° has been isolated and purified. This information indicates that the natural product:

Which of the following is the definition of a pair of diastereomers?

Instructions: Refer to the structure below to answer the following questions. -Refer to instructions. Give the complete name of the enantiomer of (S)-(-)-serine.

Which of the following physical properties can be used to identify a compound?

Which of the following compounds is (are) achiral?

How many stereoisomers of 3-chloro-2-methylbutane exist?

Which of the following is the definition of a pair of enantiomers?

Which of the following has a plane of symmetry?

How many stereoisomers of 2,3-dimethylbutane exist?

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

A natural product having [ $\alpha$ ]_D = +40.3° has been isolated and purified. This information indicates that the natural product: