Question 1

Which diene would you expect to react most rapidly with maleic anhydride?

Accepted Answer

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

Question 2

The allyl radical has how many electrons in non-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

Considering both configurational and conformational factors,select the least stable form of 2,4-hexadiene.

Accepted Answer

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

Question 4

Arrange these hexadienes in order of expected increasing stability.

Accepted Answer

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

Question 5

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

Accepted Answer

A) CH2=CHCH2CH2CH=CH2 
B)    
C)    
D)    
E)    
A) CH2=CHCH2CH2CH=CH2 
B)    
C)    
D)    
E)

Question 6

Which diene and dienophile would you choose to synthesize 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 7

Which pair does not represent a pair of resonance structures?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All of these choices represent pairs of resonance structures. 
A) I 
B) II 
C) III 
D) IV 
E) All of these choices represent pairs of resonance structures.

Question 8

Predict the product(s)of the following reaction:

Accepted Answer

@#IMG-DLM& Topic Con

Question 9

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

Accepted Answer

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

Question 10

Considering both configurational and conformational factors,select the most stable form of 2,4-hexadiene.

Accepted Answer

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

Question 11

Which carbon-carbon bond in the following compound would you expect to be longest?

Accepted Answer

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

Question 12

Predict the product of the following Diels-Alder cycloaddition reaction:

Accepted Answer

@#IMG-DLM& Topic Die

Question 13

What is an IUPAC name for this triene?

Accepted Answer

A) (2E,4Z,6
E) -2,4,6-Nonatriene 
B) (2Z,4E,6Z)-2,4,6-Nonatriene 
C) (2E,4Z,6Z)-2,4,6-Nonatriene 
D) (3Z,5Z,7
E) -3,5,7-Nonatriene 
E) (3Z,5E,7
E) -3,5,7-Nonatriene 
A) (2E,4Z,6
E) -2,4,6-Nonatriene 
B) (2Z,4E,6Z)-2,4,6-Nonatriene 
C) (2E,4Z,6Z)-2,4,6-Nonatriene 
D) (3Z,5Z,7
E) -3,5,7-Nonatriene 
E) (3Z,5E,7
E) -3,5,7-Nonatriene

Question 14

Which diene and dienophile would you choose to synthesize 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 15

Which diene and dienophile would you choose to synthesize 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

The accompanying diagram implies that:

Accepted Answer

A) the formation of A from B would be favored at high temperature. 
B) the more stable product forms more rapidly from the intermediate species. 
C) the formation of B from the intermediate is the rate-limiting step in the transformation of A into B 
D) the formation of B from A is not a concerted reaction. 
E) All of these statements are true. 
A) the formation of A from B would be favored at high temperature. 
B) the more stable product forms more rapidly from the intermediate species. 
C) the formation of B from the intermediate is the rate-limiting step in the transformation of A into B 
D) the formation of B from A is not a concerted reaction. 
E) All of these statements are true.

Question 17

Which pair does not represent a pair of resonance structures?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All of these choices represent pairs of resonance structures. 
A) I 
B) II 
C) III 
D) IV 
E) All of these choices represent pairs of resonance structures.

Question 18

Which compound would have a UV absorption band at longest wavelength?

Accepted Answer

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

Question 19

The hydrogen atom on a saturated (sp3)carbon adjacent to a double bond is called an ___ hydrogen.

Accepted Answer

Question 20

What is an IUPAC name for this triene?

Accepted Answer

A) (2E,4Z,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene 
B) (2Z,4E,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene 
C) (2E,4Z,6
E) -2,3,6,7-tetramethyl-3,5,7-Nonatriene 
D) (2E,4Z,6
E) -2,3,6,7-tetramethyl-3,5,7-nonatriene 
E) (2E,4E,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene 
A) (2E,4Z,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene 
B) (2Z,4E,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene 
C) (2E,4Z,6
E) -2,3,6,7-tetramethyl-3,5,7-Nonatriene 
D) (2E,4Z,6
E) -2,3,6,7-tetramethyl-3,5,7-nonatriene 
E) (2E,4E,6
E) -3,4,7,8-tetramethyl-2,4,6-Nonatriene

Exam 13: Conjugated Unsaturated Systems

Which diene would you expect to react most rapidly with maleic anhydride?

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

Considering both configurational and conformational factors,select the least stable form of 2,4-hexadiene.

Arrange these hexadienes in order of expected increasing stability.

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

Which diene and dienophile would you choose to synthesize the following compound?

Which pair does not represent a pair of resonance structures?

Predict the product(s)of the following reaction:

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

Considering both configurational and conformational factors,select the most stable form of 2,4-hexadiene.

Which carbon-carbon bond in the following compound would you expect to be longest?

Predict the product of the following Diels-Alder cycloaddition reaction:

What is an IUPAC name for this triene?

Which diene and dienophile would you choose to synthesize the following compound?

Which diene and dienophile would you choose to synthesize the following compound?

The accompanying diagram implies that:

Which pair does not represent a pair of resonance structures?

Which compound would have a UV absorption band at longest wavelength?

The hydrogen atom on a saturated (sp3)carbon adjacent to a double bond is called an ___ hydrogen.

What is an IUPAC name for this triene?

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 non-bonding $\pi$ molecular orbitals?

The hydrogen atom on a saturated (sp³)carbon adjacent to a double bond is called an ___ hydrogen.