Question 1

The major monobrominated product which results when methylcyclohexane is subjected to free radical bromination is

Accepted Answer

A)  a primary bromide.
B)  a secondary bromide.
C)  a tertiary bromide.
D)  a quaternary bromide.
E)  bromomethane.

Question 2

Write a detailed,stepwise mechanism for the following reaction.

Accepted Answer

The answer of Write a detailed,stepwise mechanism for the following...

Question 3

What sequence of reagents can be used to accomplish the conversion shown below?

Accepted Answer

1.H₂SO₄,△ 2....

Question 4

Which of the following most nearly describes the geometry of the methyl radical?

Accepted Answer

A)  trigonal pyramid,bond angle 109.5°
B)  trigonal pyramid,bond angle 120°
C)  trigonal planar,bond angle 109.5°
D)  trigonal planar,bond angle 120°

Question 5

Name each distinct alkyl chloride (including stereoisomers)that can be generated from monochlorination of 2,2-dimethylbutane.

Accepted Answer

1-chloro-2,2-dimethylbutane (R...

Question 6

The following molecule contains how many 1°,2°,and 3° hydrogens?

Accepted Answer

The answer of The following molecule contains how many 1°,2°,and...

Question 7

Write the structures of all of the monobromination products of 1,1,3,3-tetramethylcyclobutane.

Accepted Answer

The answer of Write the structures of all of the...

Question 8

Given the bond dissociation energies below (in kcal/mol) ,estimate the ΔH° for the propagation step (CH3) 2CH∙ + Cl2 → (CH3) 2CHCl + Cl∙.
CH3CH2CH2-H 98
(CH3) 2CH-H 95
Cl-Cl 58
H-Cl 103
CH3CH2CH2-Cl 81
(CH3) 2CH-Cl 80

Accepted Answer

A)  -22 kcal/mol
B)  +22 kcal/mol
C)  -40 kcal/mol
D)  +45 kcal/mol
E)  -45 kcal/mol

Question 9

Which of the following is true about the halogenation of methane,CH4?

Accepted Answer

A)  The activation energy for F ∙ + CH4 → ∙ CH3 + HF is larger than any other halogen.
B)  O2 slows these reactions by inhibiting the termination step.
C)  The activation energy for I ∙ + CH4 → ∙ CH3 + HI is relatively small.
D)  The reaction must take place in the liquid state.
E)  I2 is unreactive because the activation energy for I ∙ + CH4 → ∙ CH3 + HI is relatively large.

Question 10

When petroleum is distilled,the fraction that contains compounds with 5 to 11 carbons is known as

Accepted Answer

A)  natural gas.
B)  asphalt.
C)  diesel oil.
D)  gasoline.
E)  jet fuel.

Question 11

Vitamin C,shown below,is an antioxidant that undergoes hydrogen atom abstraction reaction with damaging radicals.Indicate which of the labeled hydrogens is prone to abstraction by a radical?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  All of the above can be abstracted with equal probability.

Question 12

Give the best product for the reaction.

Accepted Answer

The answer of Give the best product for the reaction....

Question 13

Provide the major organic product of the following reactions.

Accepted Answer

The answer of Provide the major organic product of the...

Question 14

Provide the reagents necessary for carrying out the transformation of 2-methylheptane to 2-methyl-1-heptene.

Accepted Answer

1.Br₂,hυ 2....

Question 15

Devise methods by which the following molecule could be synthesized from cyclohexane.

Accepted Answer

Cl₂,hυ; NaO...

Question 16

What sequence of reagents can be used to accomplish the conversion shown below?

Accepted Answer

1.Br₂,hν 2....

Question 17

What is the major product of the following reaction?

Accepted Answer

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

Question 18

Which of the following statements concerning the use of hydrocarbons as fuels is not correct?

Accepted Answer

A)  The alkane n-octane has an octane number of 100 which indicates its high performance in automobile engines.
B)  Catalytic cracking converts straight-chain hydrocarbons that are poor fuels into branched-chain compounds.
C)  When poor fuels are used in an engine,combustion can occur before the spark plug fires which results in knocking.
D)  The quality of a fuel is indicated by its octane number,and a higher octane number typically results in less engine knocking.
E)  none of the above

Question 19

What is the major product of the following reaction?

Accepted Answer

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

Question 20

Give the steps and intermediates needed for the following reaction.

Accepted Answer

The answer of Give the steps and intermediates needed for...

Exam 12: Radicals

What sequence of reagents can be used to accomplish the conversion shown below?

Correct Answerverified1.H2SO4,△ 2....View AnswerShow Answer

Provide the major organic product of the following reactions.

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What sequence of reagents can be used to accomplish the conversion shown below?

Correct Answerverified1.Br2,hν 2....View AnswerShow Answer

Write the structures of all of the monobromination products of 1,1,3,3-tetramethylcyclobutane.

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Which of the following most nearly describes the geometry of the methyl radical?

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When petroleum is distilled,the fraction that contains compounds with 5 to 11 carbons is known as

Correct AnswerverifiedShow Answer

Provide the reagents necessary for carrying out the transformation of 2-methylheptane to 2-methyl-1-heptene.

Correct Answerverified1.Br2,hυ 2....View AnswerShow Answer

Devise methods by which the following molecule could be synthesized from cyclohexane.

Correct AnswerverifiedCl2,hυ; NaO...View AnswerShow Answer

What is the major product of the following reaction?

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Give the steps and intermediates needed for the following reaction.

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Give the best product for the reaction.

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Given the bond dissociation energies below (in kcal/mol) ,estimate the ΔH° for the propagation step (CH3) 2CH∙ + Cl2 → (CH3) 2CHCl + Cl∙. CH3CH2CH2-H 98 (CH3) 2CH-H 95 Cl-Cl 58 H-Cl 103 CH3CH2CH2-Cl 81 (CH3) 2CH-Cl 80

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The major monobrominated product which results when methylcyclohexane is subjected to free radical bromination is

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The following molecule contains how many 1°,2°,and 3° hydrogens?

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Vitamin C,shown below,is an antioxidant that undergoes hydrogen atom abstraction reaction with damaging radicals.Indicate which of the labeled hydrogens is prone to abstraction by a radical?

Correct AnswerverifiedShow Answer

Name each distinct alkyl chloride (including stereoisomers)that can be generated from monochlorination of 2,2-dimethylbutane.

Correct Answerverified1-chloro-2,2-dimethylbutane (R...View AnswerShow Answer

Which of the following is true about the halogenation of methane,CH4?

Correct AnswerverifiedShow Answer

Which of the following statements concerning the use of hydrocarbons as fuels is not correct?

Correct AnswerverifiedShow Answer

Write a detailed,stepwise mechanism for the following reaction.

Correct AnswerverifiedShow Answer

What is the major product of the following reaction?

Correct AnswerverifiedShow Answer

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1.H₂SO₄,△ 2....
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1.Br₂,hν 2....
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1.Br₂,hυ 2....
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Cl₂,hυ; NaO...
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Given the bond dissociation energies below (in kcal/mol) ,estimate the ΔH° for the propagation step (CH₃) ₂CH∙ + Cl₂ → (CH₃) ₂CHCl + Cl∙. CH₃CH₂CH₂-H 98 (CH₃) ₂CH-H 95 Cl-Cl 58 H-Cl 103 CH₃CH₂CH₂-Cl 81 (CH₃) ₂CH-Cl 80

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1-chloro-2,2-dimethylbutane (R...
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Which of the following is true about the halogenation of methane,CH₄?

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