Question 1

Why would the compound below not react with a dienophile in a Diels-Alder reaction?

Accepted Answer

A)  The compound is not a conjugated diene. 
B)  There are no electron withdrawing groups on the compound. 
C)  There are no electron donating groups on the compound. 
D)  The compound can not adopt the s-cis conformation. 
A)  The compound is not a conjugated diene. 
B)  There are no electron withdrawing groups on the compound. 
C)  There are no electron donating groups on the compound. 
D)  The compound can not adopt the s-cis conformation.

Question 2

How would you favor the formation of the kinetic product of the following reaction?

Accepted Answer

A)  Excess HBr 
B)  Long reaction time 
C)  Low temperature 
D)  High pressure 
A)  Excess HBr 
B)  Long reaction time 
C)  Low temperature 
D)  High pressure

Question 3

Which of the following is the appropriate term for the mechanism of the addition of HBr to 1,3-dienes?

Accepted Answer

A)  Nucleophilic addition 
B)  Electrophilic addition 
C)  Free radical addition 
D)  Conjugate addition 
A)  Nucleophilic addition 
B)  Electrophilic addition 
C)  Free radical addition 
D)  Conjugate addition

Question 4

Which of the following statements about kinetic vs. thermodynamic products is true?

Accepted Answer

A)  The product that is formed faster is the thermodynamic product. 
B)  The kinetic product predominates at low temperature. 
C)  The product that predominates at equilibrium is the kinetic product. 
D)  The thermodynamic product is less stable. 
A)  The product that is formed faster is the thermodynamic product. 
B)  The kinetic product predominates at low temperature. 
C)  The product that predominates at equilibrium is the kinetic product. 
D)  The thermodynamic product is less stable.

Why would the compound below not react with a dienophile in a Diels-Alder reaction?

How would you favor the formation of the kinetic product of the following reaction?

Which of the following is the appropriate term for the mechanism of the addition of HBr to 1,3-dienes?

Which of the following statements about kinetic vs. thermodynamic products is true?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers and Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Lipids

Synthetic Polymers

Filters

Exam 16: Conjugation, Resonance, and Dienes

Why would the compound below not react with a dienophile in a Diels-Alder reaction?

How would you favor the formation of the kinetic product of the following reaction?

Which of the following is the appropriate term for the mechanism of the addition of HBr to 1,3-dienes?

Which of the following statements about kinetic vs. thermodynamic products is true?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers and Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Lipids

Synthetic Polymers

Filters