Question 1

Rank the following dienes in order of decreasing heat of hydrogenation,putting the diene with the highest heat of hydrogenation first.

Accepted Answer

A) I > II > III 
B) III > II > I 
C) II > I > III 
D) III > I > II 
A) I > II > III 
B) III > II > I 
C) II > I > III 
D) III > I > II

Question 2

Which of the following is the least reactive diene in a Diels-Alder reaction?

Accepted Answer

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

Question 3

Which of the following is not a resonance structure of acetic anhydride?

Accepted Answer

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

Question 4

Which of the following is not a feature of the Diels-Alder reaction?

Accepted Answer

A) They are initiated by peroxides. 
B) They form new six-membered rings. 
C) Three π bonds break. 
D) They are concerted. 
A) They are initiated by peroxides. 
B) They form new six-membered rings. 
C) Three π bonds break. 
D) They are concerted.

Question 5

Which of the following conjugated dienes represent two conformations?

Accepted Answer

A) Only I and II 
B) Only I and III 
C) Only II and III 
D) None of the choices 
A) Only I and II 
B) Only I and III 
C) Only II and III 
D) None of the choices

Question 6

Which of the following dienes contain isolated double bonds?

Accepted Answer

A) Only I and II 
B) Only II and III 
C) Only I and III 
D) Only II and IV 
A) Only I and II 
B) Only II and III 
C) Only I and III 
D) Only II and IV

Question 7

Which of the following is an example of a bridged bicyclic system?

Accepted Answer

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

Question 8

What diene and dienophile are used in a Diels-Alder reaction to prepare the following compound?

Accepted Answer

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

Question 9

What is the major organic product of the following reaction?

Accepted Answer

A) Only I 
B) Only II 
C) Only III 
D) Only I and II 
A) Only I 
B) Only II 
C) Only III 
D) Only I and II

Question 10

What is the thermodynamic product obtained from the addition of 1 equivalent of HBr to 1,3-butadiene?

Accepted Answer

A) 3-Bromo-1-butene 
B) 1-Bromo-2-butene 
C) 2-Bromo-2-butene 
D) 2-Bromo-1-butene 
A) 3-Bromo-1-butene 
B) 1-Bromo-2-butene 
C) 2-Bromo-2-butene 
D) 2-Bromo-1-butene

Question 11

What is the major organic product of the following reaction?

Accepted Answer

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

Question 12

Which of the following compounds is the most reactive dienophile in a Diels-Alder reaction?

Accepted Answer

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

Question 13

Rank the following dienophile in order of increasing reactivity in a Diels-Alder reaction,listing the least reactive first.

Accepted Answer

A) I < II < III 
B) III < I < II 
C) II < I < III 
D) III < II < I 
A) I < II < III 
B) III < I < II 
C) II < I < III 
D) III < II < I

Exam 14: Conjugation,resonance,and Dienes

Rank the following dienes in order of decreasing heat of hydrogenation,putting the diene with the highest heat of hydrogenation first.

Which of the following is the least reactive diene in a Diels-Alder reaction?

Which of the following is not a resonance structure of acetic anhydride?

Which of the following is not a feature of the Diels-Alder reaction?

Which of the following conjugated dienes represent two conformations?

Which of the following dienes contain isolated double bonds?

Which of the following is an example of a bridged bicyclic system?

What diene and dienophile are used in a Diels-Alder reaction to prepare the following compound?

What is the major organic product of the following reaction?

What is the thermodynamic product obtained from the addition of 1 equivalent of HBr to 1,3-butadiene?

What is the major organic product of the following reaction?

Which of the following compounds is the most reactive dienophile in a Diels-Alder reaction?

Rank the following dienophile in order of increasing reactivity in a Diels-Alder reaction,listing the least reactive first.

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 Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

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