Question 1

The device that is used for measuring the effect of optically active compounds on plane-polarized light is called a ___.

Accepted Answer

The answer of The device that is used for measuring...

Question 2

What can be said with certainty if a compound has [$\alpha$]     = -9.25 ?

Accepted Answer

A) The compound has the (S)configuration. 
B) The compound has the (R)configuration. 
C) The compound is not a meso form. 
D) The compound possesses only one stereogenic center. 
E) The compound has an optical purity of less than 100%. 
A) The compound has the (S)configuration. 
B) The compound has the (R)configuration. 
C) The compound is not a meso form. 
D) The compound possesses only one stereogenic center. 
E) The compound has an optical purity of less than 100%.

Question 3

The molecules below are:

Accepted Answer

A) constitutional isomers. 
B) enantiomers. 
C) diastereomers. 
D) identical. 
E) None of these choices. 
A) constitutional isomers. 
B) enantiomers. 
C) diastereomers. 
D) identical. 
E) None of these choices.

Question 4

Which of the following are enantiomers of the compound (+)-camphor:

Accepted Answer

A) I only 
B) I and II only 
C) II only 
D) I and III only 
E) I,II and III 
A) I only 
B) I and II only 
C) II only 
D) I and III only 
E) I,II and III

Question 5

What is the molecular formula for the alkane of smallest molecular weight which possesses a stereogenic center?

Accepted Answer

A) C4H10 
B) C5H12 
C) C6H14 
D) C7H16 
E) C8H18 
A) C4H10 
B) C5H12 
C) C6H14 
D) C7H16 
E) C8H18

Question 6

Draw a dash-wedge structure for (1R,2S,3S)-3-bromo-2-vinylcyclohexanol

Accepted Answer

The answer of Draw a dash-wedge structure for (1R,2S,3S)-3-bromo-2-vinylcyclohexanol...

Question 7

Of the compounds which correspond to the general name "dichlorocyclobutane," how many are optically active?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 8

The molecules shown are:

Accepted Answer

A) constitutional isomers. 
B) enantiomers. 
C) diastereomers. 
D) identical. 
E) None of these choices. 
A) constitutional isomers. 
B) enantiomers. 
C) diastereomers. 
D) identical. 
E) None of these choices.

Question 9

The compound shown below is an isomer of the asthma medication albuterol.Indicate whether the compound is (R)-albuterol or (S)-albuterol?

Accepted Answer

The answer of The compound shown below is an isomer...

Question 10

Which of the following is a meso compound?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 11

I and II are:

Accepted Answer

A) constitutional isomers. 
B) enantiomers. 
C) identical. 
D) diastereomers. 
E) not isomeric. 
A) constitutional isomers. 
B) enantiomers. 
C) identical. 
D) diastereomers. 
E) not isomeric.

Question 12

An equimolar mixture of two enantiomers is called a ___.

Accepted Answer

The answer of An equimolar mixture of two enantiomers is...

Question 13

Draw Fischer projection formulas for all stereoisomers of 2,4-dimethyl-3-hexanol,giving stereochemical details for each structure.

Accepted Answer

The answer of Draw Fischer projection formulas for all stereoisomers...

Question 14

Which of the following is NOT true of enantiomers? They have the same:

Accepted Answer

A) boiling point. 
B) melting point. 
C) specific rotation. 
D) density. 
E) chemical reactivity toward achiral reagents. 
A) boiling point. 
B) melting point. 
C) specific rotation. 
D) density. 
E) chemical reactivity toward achiral reagents.

Question 15

Draw Fischer projection formulas for all stereoisomers of 2,4-dibromohexane,giving stereochemical details for each structure.

Accepted Answer

The answer of Draw Fischer projection formulas for all stereoisomers...

Question 16

Draw a dash-wedge structure for (R)-2,3,5-trimethylhexane

Accepted Answer

The answer of Draw a dash-wedge structure for (R)-2,3,5-trimethylhexane...

Question 17

Which compound (I-IV)is (2R,3R)-2,3-butanediol?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) None of these choices. 
A) I 
B) II 
C) III 
D) IV 
E) None of these choices.

Question 18

Which of the following is true of any (S)-enantiomer?

Accepted Answer

A) It rotates plane-polarized light to the right. 
B) It rotates plane-polarized light to the left. 
C) It is a racemic form. 
D) It is the mirror image of the corresponding (R)-enantiomer. 
E) It has the highest priority group on the left. 
A) It rotates plane-polarized light to the right. 
B) It rotates plane-polarized light to the left. 
C) It is a racemic form. 
D) It is the mirror image of the corresponding (R)-enantiomer. 
E) It has the highest priority group on the left.

Question 19

Which structure(s)represent(s)diastereomer(s)of I?

Accepted Answer

A) II 
B) II and III 
C) II and IV 
D) III and V 
E) IV and V 
A) II 
B) II and III 
C) II and IV 
D) III and V 
E) IV and V

Question 20

I and II are:

Accepted Answer

A) constitutional isomers. 
B) enantiomers. 
C) identical. 
D) diastereomers. 
E) not isomeric. 
A) constitutional isomers. 
B) enantiomers. 
C) identical. 
D) diastereomers. 
E) not isomeric.

Exam 5: Stereochemistry

The device that is used for measuring the effect of optically active compounds on plane-polarized light is called a ___.

What can be said with certainty if a compound has [ α\alphaα ] = -9.25 ?

The molecules below are:

Which of the following are enantiomers of the compound (+)-camphor:

What is the molecular formula for the alkane of smallest molecular weight which possesses a stereogenic center?

Draw a dash-wedge structure for (1R,2S,3S)-3-bromo-2-vinylcyclohexanol

Of the compounds which correspond to the general name "dichlorocyclobutane," how many are optically active?

The molecules shown are:

The compound shown below is an isomer of the asthma medication albuterol.Indicate whether the compound is (R)-albuterol or (S)-albuterol?

Which of the following is a meso compound?

I and II are:

An equimolar mixture of two enantiomers is called a ___.

Draw Fischer projection formulas for all stereoisomers of 2,4-dimethyl-3-hexanol,giving stereochemical details for each structure.

Which of the following is NOT true of enantiomers? They have the same:

Draw Fischer projection formulas for all stereoisomers of 2,4-dibromohexane,giving stereochemical details for each structure.

Draw a dash-wedge structure for (R)-2,3,5-trimethylhexane

Which compound (I-IV)is (2R,3R)-2,3-butanediol?

Which of the following is true of any (S)-enantiomer?

Which structure(s)represent(s)diastereomer(s)of I?

I and II are:

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

What can be said with certainty if a compound has [ $\alpha$ ] $What can be said with certainty if a compound has [ \alpha ] <sub> </sub> = -9.25 ?$ = -9.25 ?