Question 1

Which of these dienes can undergo the Diels-Alder reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 2

The allyl radical has how many electrons in bonding $\pi$ molecular orbitals?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 3

Show the steps and reagents necessary to prepare the following compound from organic compounds having six carbons or less.Use retrosynthetic analysis as a tool to guide your synthesis.

Accepted Answer

The answer of Show the steps and reagents necessary to...

Question 4

Complete the following sequence of reactions,giving structural details of all key intermediates.

Accepted Answer

The answer of Complete the following sequence of reactions,giving structural...

Question 5

Which diene and dienophile would you use to prepare the following molecule using a Diels-Alder cycloaddition reaction:

Accepted Answer

The answer of Which diene and dienophile would you use...

Question 6

Polyenes in which single and double bonds alternate along the carbon chain are called ___.

Accepted Answer

The answer of Polyenes in which single and double bonds...

Question 7

What combination of diene and dieneophile can be used to prepare the following compound through a Diels-Alder cycloaddition reaction:

Accepted Answer

The answer of What combination of diene and dieneophile can...

Question 8

Which of these dienes is the most reactive in the Diels-Alder reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

The LUMO of 1,3-pentadiene has how many electrons in its ground state?

Accepted Answer

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

Question 10

Ignoring stereochemistry,the 1:1 reaction of chlorine with 1,3-cyclohexadiene at 25 S1U1P1$\circ$S1S1P0C in the dark and in the absence of peroxide forms which of these?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) Both I and II 
A) I 
B) II 
C) III 
D) IV 
E) Both I and II

Question 11

Which diene would be least stable?

Accepted Answer

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

Question 12

Select the most energetically favorable UV transition for 1,3-butadiene.

Accepted Answer

A) "n $\to$  $\sigma$*" 
B) "n $\to$ $\pi$*" 
C) "$\pi$2  $\to$ $\pi$3*" 
D) "$\sigma$ $\to$  $\sigma$*" 
E) "$\pi$1  $\to$ $\pi$4*" 
A) "n $\to$  $\sigma$*" 
B) "n $\to$ $\pi$*" 
C) "$\pi$2  $\to$ $\pi$3*" 
D) "$\sigma$ $\to$  $\sigma$*" 
E) "$\pi$1  $\to$ $\pi$4*"

Question 13

Select the structure of the conjugated diene.

Accepted Answer

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

Question 14

Which of these dienes can undergo the Diels-Alder reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E) All of these choices can undergo the Diels-Alder reaction. 
A)    
B)    
C)    
D)    
E) All of these choices can undergo the Diels-Alder reaction.

Question 15

Which of the following would afford a synthesis of the following compound?

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 16

Which of these dienes can undergo a Diels-Alder reaction?

Accepted Answer

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

Question 17

Which of the following would afford a synthesis of the following compound?

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 pairs of compounds could be used as the basis for a Diels-Alder synthesis of the compound shown below?

Accepted Answer

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

Question 19

Which alkene would you expect to have the smallest heat of hydrogenation?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

Select the structure of the isolated diene.

Accepted Answer

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

Exam 13: Conjugated Unsaturated Systems

Which of these dienes can undergo the Diels-Alder reaction?

The allyl radical has how many electrons in bonding π\piπ molecular orbitals?

Show the steps and reagents necessary to prepare the following compound from organic compounds having six carbons or less.Use retrosynthetic analysis as a tool to guide your synthesis.

Complete the following sequence of reactions,giving structural details of all key intermediates.

Which diene and dienophile would you use to prepare the following molecule using a Diels-Alder cycloaddition reaction:

Polyenes in which single and double bonds alternate along the carbon chain are called ___.

What combination of diene and dieneophile can be used to prepare the following compound through a Diels-Alder cycloaddition reaction:

Which of these dienes is the most reactive in the Diels-Alder reaction?

The LUMO of 1,3-pentadiene has how many electrons in its ground state?

Ignoring stereochemistry,the 1:1 reaction of chlorine with 1,3-cyclohexadiene at 25 ∘\circ∘ C in the dark and in the absence of peroxide forms which of these?

Which diene would be least stable?

Select the most energetically favorable UV transition for 1,3-butadiene.

Select the structure of the conjugated diene.

Which of these dienes can undergo the Diels-Alder reaction?

Which of the following would afford a synthesis of the following compound?

Which of these dienes can undergo a Diels-Alder reaction?

Which of the following would afford a synthesis of the following compound?

Which of the following pairs of compounds could be used as the basis for a Diels-Alder synthesis of the compound shown below?

Which alkene would you expect to have the smallest heat of hydrogenation?

Select the structure of the isolated diene.

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

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

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 allyl radical has how many electrons in bonding $\pi$ molecular orbitals?