Question 1

Select the structure(s)of the conjugated diene(s).

Accepted Answer

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

Question 2

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 3

Which alkene would you expect to have the highest 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 4

Which compounds could be used in a Diels-Alder synthesis of

Accepted Answer

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

Question 5

Which is not an example of resonance?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) None of these choices are examples of resonance. 
A) I 
B) II 
C) III 
D) IV 
E) None of these choices are examples of resonance.

Question 6

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 7

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

Accepted Answer

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

Question 8

An equilibrium-controlled reaction will yield predominantly:

Accepted Answer

A) the more/most stable product. 
B) the product whose formation requires the smallest free energy of activation. 
C) the product that can be formed in the fewest steps. 
D) the product that is formed at the fastest rate. 
E) the product which possesses the greatest potential energy. 
A) the more/most stable product. 
B) the product whose formation requires the smallest free energy of activation. 
C) the product that can be formed in the fewest steps. 
D) the product that is formed at the fastest rate. 
E) the product which possesses the greatest potential energy.

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

The Diels-Alder reaction is a cycloaddition between a conjugated ___ and a ___.

Accepted Answer

The answer of The Diels-Alder reaction is a cycloaddition between...

Question 11

Which alkene would you expect to be most stable?

Accepted Answer

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

Question 12

Draw the structural formula for (2Z,4Z,6Z)-3,4,8-trimethyl-2,4,6-nonatriene,clearly indicating stereochemical details.

Accepted Answer

The answer of Draw the structural formula for (2Z,4Z,6Z)-3,4,8-trimethyl-2,4,6-nonatriene,clearly indicating...

Question 13

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 14

When the product distribution for a particular reaction reflects the relative rate at which the products are formed,the reaction is said to be under ___ control.

Accepted Answer

The answer of When the product distribution for a particular...

Question 15

Which compounds could be used in a Diels-Alder synthesis of

Accepted Answer

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

Question 16

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 17

What is the product of the following reaction?

Accepted Answer

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

Question 18

Which compounds could be used in a Diels-Alder synthesis of

Accepted Answer

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

Question 19

Which reaction would produce 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 20

Which of the following dienes is a cumulated diene?

Accepted Answer

A) CH2=CHCH2CH2CH2CH=CH2 
B) CH2=CHCH=CHCH2CH2CH3 
C) CH3CH=C=CHCH2CH2CH3 
D) CH3CH=CHCH=CHCH2CH3 
E) CH3CH2CH=CHCH2CH=CH2 
A) CH2=CHCH2CH2CH2CH=CH2 
B) CH2=CHCH=CHCH2CH2CH3 
C) CH3CH=C=CHCH2CH2CH3 
D) CH3CH=CHCH=CHCH2CH3 
E) CH3CH2CH=CHCH2CH=CH2

Exam 13: Conjugated Unsaturated Systems

Select the structure(s)of the conjugated diene(s).

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.

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

Which compounds could be used in a Diels-Alder synthesis of

Which is not an example of resonance?

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.

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

An equilibrium-controlled reaction will yield predominantly:

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

The Diels-Alder reaction is a cycloaddition between a conjugated ___ and a ___.

Which alkene would you expect to be most stable?

Draw the structural formula for (2Z,4Z,6Z)-3,4,8-trimethyl-2,4,6-nonatriene,clearly indicating stereochemical details.

Which pair does not represent a pair of resonance structures?

When the product distribution for a particular reaction reflects the relative rate at which the products are formed,the reaction is said to be under ___ control.

Which compounds could be used in a Diels-Alder synthesis of

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.

What is the product of the following reaction?

Which compounds could be used in a Diels-Alder synthesis of

Which reaction would produce the following compound?

Which of the following dienes is a cumulated 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 Diels-Alder reaction is a cycloaddition between a conjugated _ and a _.