Question 1

The substituent R on the bicyclic compound shown is considered to be?

Accepted Answer

A)  axial
B)  equatorial
C)  endo
D)  exo
E)  transF) None of the above
G) B) and E)

Question 2

Which carbocation would be most stable?

Accepted Answer

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

Question 3

1,3-Butadiene has how many electrons in its ground state bonding  π\piπ  molecular orbitals?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  0 F) A) and D)
G) A) and C)

Question 4

Vinyl cations are ___ stable than tertiary cations.

Accepted Answer

The answer of Vinyl cations are ___ stable than tertiary...

Question 5

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

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  0F) B) and E)
G) A) and E)

Question 6

What reagents would be needed to synthesize the following substance via the Diels-Alder reaction? Give stereochemical details,as relevant.

Accepted Answer

The answer of What reagents would be needed to synthesize...

Question 7

Indicate which products would be obtained from the chlorination of 1,5-hexadiene at high temperature (500  ∘\circ∘ C) ,using a 1:1 mole ratio of the reactants.  \circ C) ,using a 1:1 mole ratio of the reactants.   A) I and II B) II and III C) III and IV D) IV and V E) V and I " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 8

Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Accepted Answer

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

Question 9

Ignoring stereochemistry,the 1:1 reaction of bromine with 1,3-cyclohexadiene at 25  ∘\circ∘ C in the dark and in the absence of peroxide forms which of these?  \circ C in the dark and in the absence of peroxide forms which of these?   A) I B) II C) III D) IV E) Both I and II " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 10

Which reagent would convert 1,3-pentadiene into 3-penten-2-ol?

Accepted Answer

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

Question 11

1,3-Butadiene has how many bonding  π\piπ   molecular orbitals?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  0 F) A) and D)
G) None of the above

Question 12

Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Accepted Answer

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

Question 13

A reaction under kinetic (or rate)control will yield predominantly: ___.

Accepted Answer

the product whose fo...

Question 14

Allylic radicals are ___ stable than tertiary radicals.

Accepted Answer

The answer of Allylic radicals are ___ stable than tertiary...

Question 15

Which of the following dienes is a cumulated diene?

Accepted Answer

A)  CH2=CHCH2CH2CH=CH2
B)  CH2=CHCH=CHCH2CH3
C)  CH3CH=C=CHCH2CH3
D)  CH3CH=CHCH=CHCH3
E)  CH3CH=CHCH2CH=CH2F) A) and E)
G) B) and D)

Question 16

The HOMO of 1,3-pentadiene has how many electrons in its excited state?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  0F) A) and C)
G) B) and E)

Question 17

Show the steps and reagents necessary to prepare the following compound with a Diels-Alder reaction incorporated in the synthesis.Use retrosynthetic analysis as a tool to guide your synthesis.

Accepted Answer

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

Question 18

Which carbocation would be least stable?

Accepted Answer

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

Question 19

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.F) C) and D)
G) A) and D)

Question 20

A reaction under kinetic (or rate) control will yield predominantly:

Accepted Answer

A)  the most stable product.
B)  the product that can be formed in the fewest steps.
C)  the product whose formation requires the smallest free energy of activation.
D)  the product with the greatest potential energy.
E)  the product with the least potential energy.F) B) and C)
G) None of the above

Exam 13: Conjugated Unsaturated Systems

A reaction under kinetic (or rate)control will yield predominantly: ___.

Correct Answer
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the product whose fo...
View Answer

1,3-Butadiene has how many bonding $\pi$ molecular orbitals?

Correct Answer
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Vinyl cations are ___ stable than tertiary cations.

Correct Answer
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Show the steps and reagents necessary to prepare the following compound with a Diels-Alder reaction incorporated in the synthesis.Use retrosynthetic analysis as a tool to guide your synthesis.

Correct Answer
verified

What reagents would be needed to synthesize the following substance via the Diels-Alder reaction? Give stereochemical details,as relevant.

Correct Answer
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Allylic radicals are ___ stable than tertiary radicals.

Correct Answer
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Which reagent would convert 1,3-pentadiene into 3-penten-2-ol?

Correct Answer
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The substituent R on the bicyclic compound shown is considered to be?

Correct Answer
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1,3-Butadiene has how many electrons in its ground state bonding $\pi$ molecular orbitals?

Correct Answer
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Which of the following dienes is a cumulated diene?

Correct Answer
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Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Correct Answer
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A reaction under kinetic (or rate) control will yield predominantly:

Correct Answer
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Which carbocation would be most stable?

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

Correct Answer
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Correct Answer
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The HOMO of 1,3-pentadiene has how many electrons in its excited state?

Correct Answer
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Which carbocation would be least stable?

Correct Answer
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Which pair does not represent a pair of resonance structures?

Correct Answer
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Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Correct Answer
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Exam 13: Conjugated Unsaturated Systems

A reaction under kinetic (or rate)control will yield predominantly: ___.

Correct Answerverifiedthe product whose fo...View AnswerShow Answer

1,3-Butadiene has how many bonding π\piπ molecular orbitals?

Correct AnswerverifiedShow Answer

Vinyl cations are ___ stable than tertiary cations.

Correct AnswerverifiedShow Answer

Show the steps and reagents necessary to prepare the following compound with a Diels-Alder reaction incorporated in the synthesis.Use retrosynthetic analysis as a tool to guide your synthesis.

Correct AnswerverifiedShow Answer

What reagents would be needed to synthesize the following substance via the Diels-Alder reaction? Give stereochemical details,as relevant.

Correct AnswerverifiedShow Answer

Allylic radicals are ___ stable than tertiary radicals.

Correct AnswerverifiedShow Answer

Which reagent would convert 1,3-pentadiene into 3-penten-2-ol?

Correct AnswerverifiedShow Answer

The substituent R on the bicyclic compound shown is considered to be?

Correct AnswerverifiedShow Answer

1,3-Butadiene has how many electrons in its ground state bonding π\piπ molecular orbitals?

Correct AnswerverifiedShow Answer

Which of the following dienes is a cumulated diene?

Correct AnswerverifiedShow Answer

Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Correct AnswerverifiedShow Answer

A reaction under kinetic (or rate) control will yield predominantly:

Correct AnswerverifiedShow Answer

Which carbocation would be most stable?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The HOMO of 1,3-pentadiene has how many electrons in its excited state?

Correct AnswerverifiedShow Answer

Which carbocation would be least stable?

Correct AnswerverifiedShow Answer

Which pair does not represent a pair of resonance structures?

Correct AnswerverifiedShow Answer

Which of the following dieneophiles is most reactive in a Diels-Alder reaction:

Correct AnswerverifiedShow Answer

Correct Answer
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the product whose fo...
View Answer

1,3-Butadiene has how many bonding $\pi$ molecular orbitals?

Correct Answer
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Correct Answer
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1,3-Butadiene has how many electrons in its ground state bonding $\pi$ molecular orbitals?

Correct Answer
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