Question 1

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

Question 2

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

Accepted Answer

@#IMG-DLM& Topic Die

Question 3

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 4

Which carbocation would be most stable?

Accepted Answer

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

Question 5

Which hydrogen atom(s)of   is/are most susceptible to abstraction by free radicals?

Accepted Answer

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

Question 6

Which reagent would convert 1,3-octadiene into 3-octen-2-ol?

Accepted Answer

A)  KMnO4/-OH 
B)  OsO4 
C)  H2O2,then H3O+ 
D)  Cl2/H2O 
E)  H3O+ 
A)  KMnO4/-OH 
B)  OsO4 
C)  H2O2,then H3O+ 
D)  Cl2/H2O 
E)  H3O+

Question 7

Which reaction would produce the following compound?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  None of the above 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  None of the above

Question 8

Systems that have a p orbital on an atom adjacent to a double bond are called ______________ systems.

Accepted Answer

conjugated

Question 9

A thermodynamically-controlled reaction will yield predominantly:___________.

Accepted Answer

the more/m

Question 10

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

Accepted Answer

A)  1,2-Heptadiene 
B)  1,3-Heptadiene 
C)  1,4-Heptadiene 
D)  1,5-Heptadiene 
E)  1,6-Heptadiene 
A)  1,2-Heptadiene 
B)  1,3-Heptadiene 
C)  1,4-Heptadiene 
D)  1,5-Heptadiene 
E)  1,6-Heptadiene

Question 11

Which compound would have the shortest carbon-carbon single bond?

Accepted Answer

A)  CH3-CH3 
B)  CH2=CH-CH3 
C)  HC$ \equiv$C-C$ \equiv$CH 
D)  CH2=CH-C$ \equiv$CH 
E)  CH2=CH-CH=CH2 
A)  CH3-CH3 
B)  CH2=CH-CH3 
C)  HC$ \equiv$C-C$ \equiv$CH 
D)  CH2=CH-C$ \equiv$CH 
E)  CH2=CH-CH=CH2

Question 12

The compound shown below undergoes a retro-Diels-Alder cycloaddition reaction to yield
carbon dioxide and another compound.Predict the structure of the other compound
formed.

Accepted Answer

The answer of The compound shown below undergoes a retro-Diels-Alder...

Question 13

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 14

Indicate which products would be obtained from the chlorination of 1,5-hexadiene at high temperature (500$\degree$C),using a 1:1 mole ratio of the reactants.

Accepted Answer

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

Question 15

During Diels-Alder reactions,when two stereoisomer products,exo and endo,are possible,the ___________ product is typically obtained as the major product.

Accepted Answer

The answer of During Diels-Alder reactions,when two stereoisomer products,exo and...

Question 16

Which carbon of   is predicted to be the major site of substitution when this alkene reacts with chlorine at 400  $\degree$C?

Accepted Answer

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

Question 17

Which would be the best synthesis of the following compound?

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 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 19

What product(s)would you expect from the following substitution reaction?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  More than one of the above 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  More than one of the above

Question 20

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...

Exam 13: Conjugated Unsaturated Systems

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

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

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

Which carbocation would be most stable?

Which hydrogen atom(s)of is/are most susceptible to abstraction by free radicals?

Which reagent would convert 1,3-octadiene into 3-octen-2-ol?

Which reaction would produce the following compound?

Systems that have a p orbital on an atom adjacent to a double bond are called ______________ systems.

A thermodynamically-controlled reaction will yield predominantly:___________.

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

Which compound would have the shortest carbon-carbon single bond?

The compound shown below undergoes a retro-Diels-Alder cycloaddition reaction to yield carbon dioxide and another compound.Predict the structure of the other compound formed.

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

Indicate which products would be obtained from the chlorination of 1,5-hexadiene at high temperature (500 °\degree° C),using a 1:1 mole ratio of the reactants.

During Diels-Alder reactions,when two stereoisomer products,exo and endo,are possible,the ___________ product is typically obtained as the major product.

Which carbon of is predicted to be the major site of substitution when this alkene reacts with chlorine at 400 °\degree° C?

Which would be the best synthesis of the following compound?

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

What product(s)would you expect from the following substitution reaction?

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

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

Which carbon of $Which carbon of is predicted to be the major site of substitution when this alkene reacts with chlorine at 400 \degree C?$ is predicted to be the major site of substitution when this alkene reacts with chlorine at 400 $\degree$ C?

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