Question 1

A racemic mixture will show a depressed boiling point as the impure mixture creates a lowering in the vapor pressure above the solution.

Accepted Answer

A) True 
 B)False  False

Question 2

The name of the product produced when cis-2-methyl-2-buten-1-ol is treated with H2 in Pd/C is:

Accepted Answer

A) (R)-2-methyl-1-butanol 
B) (S)-2-methyl-1-butanol 
C) racemic mixture of 2-methyl-1-butanol 
D) 2-methyl-1-butanol 
E) None of these choices. 
A) (R)-2-methyl-1-butanol 
B) (S)-2-methyl-1-butanol 
C) racemic mixture of 2-methyl-1-butanol 
D) 2-methyl-1-butanol 
E) None of these choices. C

Question 3

Which of the following substances is/are achiral?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) More than one of these choices. 
A) I 
B) II 
C) III 
D) IV 
E) More than one of these choices. E

Question 4

What is the complete IUPAC name of the following substance? (Remember to give stereochemical details,as relevant.)

Accepted Answer

(S)-pent-1

Question 5

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

Accepted Answer

A) It is dextrorotatory. 
B) It is levorotatory. 
C) It is an equal mixture of + and -. 
D) It is the mirror image of the (S)-enantiomer. 
E) (R)indicates a racemic mixture. 
A) It is dextrorotatory. 
B) It is levorotatory. 
C) It is an equal mixture of + and -. 
D) It is the mirror image of the (S)-enantiomer. 
E) (R)indicates a racemic mixture.

Question 6

An achiral molecule is one that is ____ upon its mirror image.

Accepted Answer

The answer of An achiral molecule is one that is...

Question 7

How many distinct dimethylcyclopropanes are there?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 8

The reaction of   with H2/Ni forms:

Accepted Answer

A) 2-methylheptane 
B) (R)-2-methyl-5-heptanol 
C) (S)-6-methyl-3-heptanol 
D) (R)- and (S)-6-methyl-3-heptanol 
E) Achiral 6,6-dimethyl-3-hexanol 
A) 2-methylheptane 
B) (R)-2-methyl-5-heptanol 
C) (S)-6-methyl-3-heptanol 
D) (R)- and (S)-6-methyl-3-heptanol 
E) Achiral 6,6-dimethyl-3-hexanol

Question 9

What is the total number of compounds,stereoisomers included,designated by the general name "dichlorocyclopentane"?

Accepted Answer

A) 4 
B) 5 
C) 7 
D) 8 
E) 9 
A) 4 
B) 5 
C) 7 
D) 8 
E) 9

Question 10

The molecule of aspartame (Nutrasweet®),depicted below,has ___ ( how many? )stereogenic centers.

Accepted Answer

The answer of The molecule of aspartame (Nutrasweet®),depicted below,has ___...

Question 11

What is the complete IUPAC name of the following substance? (Remember to give stereochemical details,as relevant.)

Accepted Answer

The answer of What is the complete IUPAC name of...

Question 12

Which structure represents (R)-1-chloro-1-fluoroethane?

Accepted Answer

A) I 
B) II 
C) III 
D) More than one of these choices. 
E) None of these choices. 
A) I 
B) II 
C) III 
D) More than one of these choices. 
E) None of these choices.

Question 13

Which of the following molecules is achiral?

Accepted Answer

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

Question 14

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 15

Draw a dash-wedge structure for (1R,3R)-1,3-dibromo-1,3-dimethylcyclohexane

Accepted Answer

The answer of Draw a dash-wedge structure for (1R,3R)-1,3-dibromo-1,3-dimethylcyclohexane...

Question 16

Draw a dash-wedge structure for (3R,4R)-4-bromo-1,3-dimethylcyclohex-1-ene

Accepted Answer

The answer of Draw a dash-wedge structure for (3R,4R)-4-bromo-1,3-dimethylcyclohex-1-ene...

Question 17

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 18

The drug Crixivan (an HIV protease inhibitor)depicted below,has ___ stereogenic centers.

Accepted Answer

The answer of The drug Crixivan (an HIV protease inhibitor)depicted...

Question 19

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 20

The compounds whose molecules are shown below would have:

Accepted Answer

A) the same melting point. 
B) different melting points. 
C) equal but opposite optical rotations. 
D) More than one of these choices. 
E) None of these choices. 
A) the same melting point. 
B) different melting points. 
C) equal but opposite optical rotations. 
D) More than one of these choices. 
E) None of these choices.

Exam 5: Stereochemistry

A racemic mixture will show a depressed boiling point as the impure mixture creates a lowering in the vapor pressure above the solution.

The name of the product produced when cis-2-methyl-2-buten-1-ol is treated with H2 in Pd/C is:

Which of the following substances is/are achiral?

What is the complete IUPAC name of the following substance? (Remember to give stereochemical details,as relevant.)

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

An achiral molecule is one that is ____ upon its mirror image.

How many distinct dimethylcyclopropanes are there?

The reaction of with H2/Ni forms:

What is the total number of compounds,stereoisomers included,designated by the general name "dichlorocyclopentane"?

The molecule of aspartame (Nutrasweet®),depicted below,has ___ ( how many? )stereogenic centers.

What is the complete IUPAC name of the following substance? (Remember to give stereochemical details,as relevant.)

Which structure represents (R)-1-chloro-1-fluoroethane?

Which of the following molecules is achiral?

I and II are:

Draw a dash-wedge structure for (1R,3R)-1,3-dibromo-1,3-dimethylcyclohexane

Draw a dash-wedge structure for (3R,4R)-4-bromo-1,3-dimethylcyclohex-1-ene

The molecules below are:

The drug Crixivan (an HIV protease inhibitor)depicted below,has ___ stereogenic centers.

I and II are:

The compounds whose molecules are shown below would have:

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

The name of the product produced when cis-2-methyl-2-buten-1-ol is treated with H₂ in Pd/C is:

The reaction of with H₂/Ni forms: