Question 1

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

Question 2

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

Accepted Answer

Cl₂,hυ; NaO

Question 3

Provide the major organic product of the following reactions.

Accepted Answer

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

Question 4

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

Question 5

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

Accepted Answer

1.H₂SO₄,△ 2.

Question 6

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

Question 7

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

Accepted Answer

1.Br₂,hυ 2.

Question 8

Give the steps and intermediates needed for the following reaction.

Accepted Answer

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

Question 9

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 10

What is the major 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 11

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. 
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 12

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 13

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 14

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 
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 15

What is the major 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 16

Write a detailed,stepwise mechanism for the following reaction.

Accepted Answer

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

Question 17

Give the best product for the reaction.

Accepted Answer

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

Question 18

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° 
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 19

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

Question 20

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

Accepted Answer

1.Br₂,hν 2.

Exam 12: Radicals

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

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

Provide the major organic product of the following reactions.

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

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

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

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

Give the steps and intermediates needed for the following reaction.

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

What is the major product of the following reaction?

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

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

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

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

What is the major product of the following reaction?

Write a detailed,stepwise mechanism for the following reaction.

Give the best product for the reaction.

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

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?

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

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds: Nomenclature, physical Properties, and Structure

Isomers: the Arrangement of Atoms in Space

Alkenes: Structure,nomenclature,and an Introduction to Reactivity - Thermodynamics and Kinetics

The Reactions of Alkenes - the Stereochemistry of Addition Reactions

The Reactions of Alkynes - Introduction to Multistep Synthesis

Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

Substitution and Elimination Reactions of Alkyl Halides

Reactions of Alcohols, ethers, epoxides, amines and Sulfur-Containing Compounds

Organometallic Compounds

Mass Spectrometry,infrared Spectroscopy,and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Α-Carbon

Reactions of Benzene and Substituted Benzenes

More About Amines - Reactions of Heterocylic Compounds

The Organic Chemistry of Carbohydrates

Amino Acids,peptides,and Proteins

Catalysis in Organic Reactions and in Enzymatic Reactions

The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

The Organic Chemistry of the Metabolic Pathways

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

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

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