Question 1

Which of the following is the best description of propane,CH3CH2CH3,at room temperature?

Accepted Answer

A) liquid,soluble in H2O 
B) gas,soluble in gasoline 
C) liquid,soluble in gasoline 
D) gas,soluble in water 
E) solid,soluble in gasoline 
A) liquid,soluble in H2O 
B) gas,soluble in gasoline 
C) liquid,soluble in gasoline 
D) gas,soluble in water 
E) solid,soluble in gasoline

Question 2

Which of the following is the most stable radical?

Accepted Answer

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

Question 3

Calculate the percentage of 1-chloro-3,4-dimethylheptane formed in the following reaction.

Accepted Answer

A) 6)70 
B) 11.16 
C) 16.96 
D) 22.32 
E) 26.80 
A) 6)70 
B) 11.16 
C) 16.96 
D) 22.32 
E) 26.80

Question 4

Fill in the empty boxes in the reaction scheme below.

Accepted Answer

The answer of Fill in the empty boxes in the...

Question 5

In the free radical chlorination of ethane,the step in which the Cl radical abstracts a H atom from ethane is ________ and the transition state most closely resembles ________.

Accepted Answer

A) exothermic,the reactants 
B) endothermic,the reactants 
C) exothermic,the products 
D) endothermic,the products 
E) endothermic,a carbocation 
A) exothermic,the reactants 
B) endothermic,the reactants 
C) exothermic,the products 
D) endothermic,the products 
E) endothermic,a carbocation

Question 6

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

Accepted Answer

1.Br₂,hν 2.

Question 7

Rank the free radicals (I-III)shown below in order of decreasing stability (i.e.,from most stable to least stable).

Accepted Answer

A) I > III > II 
B) II > III > I 
C) I > II > III 
D) II > I > III 
E) III > II > I 
A) I > III > II 
B) II > III > I 
C) I > II > III 
D) II > I > III 
E) III > II > I

Question 8

A radical mechanism is postulated to occur when cyclohexene reacts under which of the following conditions?

Accepted Answer

A) Br2,CCl4 
B) H+,H2O 
C) BH3∙THF 
D) HBr,peroxide 
E) Hg(OAc)2,H2O 
A) Br2,CCl4 
B) H+,H2O 
C) BH3∙THF 
D) HBr,peroxide 
E) Hg(OAc)2,H2O

Question 9

How many distinct alkyl chlorides can be obtained from monochlorination of 2,3-dimethylpentane?

Accepted Answer

A) 5 
B) 8 
C) 10 
D) 12 
E) 16 
A) 5 
B) 8 
C) 10 
D) 12 
E) 16

Question 10

Provide the major organic product of the following reactions.

Accepted Answer

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

Question 11

When (R)-2-bromobutane reacts with Cl2/hv,which of the following is true?

Accepted Answer

A) I is formed. 
B) II is formed. 
C) I and II are formed in equal amounts. 
D) I and II are formed in unequal amounts. 
E) I and II could never form under these conditions. 
A) I is formed. 
B) II is formed. 
C) I and II are formed in equal amounts. 
D) I and II are formed in unequal amounts. 
E) I and II could never form under these conditions.

Question 12

Provide the major organic product of the following reactions.

Accepted Answer

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

Question 13

Provide the structure of semiquinone radical.

Accepted Answer

The answer of Provide the structure of semiquinone radical....

Question 14

How many electrons are contained in the p orbital of the methyl radical?

Accepted Answer

A) zero 
B) one 
C) two 
D) three 
A) zero 
B) one 
C) two 
D) three

Question 15

During the free radical chlorination of methane,which of the following reactions has the lowest collision frequency?

Accepted Answer

A) Cl ∙ + ∙ CH3 → CH3Cl 
B) Cl ∙ + Cl2 → Cl2 + Cl ∙ 
C) ∙ CH3 + CH4 → CH4 + ∙ CH3 
D) ∙ CH3 + Cl2 → CH3Cl + Cl ∙ 
A) Cl ∙ + ∙ CH3 → CH3Cl 
B) Cl ∙ + Cl2 → Cl2 + Cl ∙ 
C) ∙ CH3 + CH4 → CH4 + ∙ CH3 
D) ∙ CH3 + Cl2 → CH3Cl + Cl ∙

Question 16

Consider the bond dissociation energies listed below in kcal/mol. CH3-Br 70
CH3CH2-Br 68
(CH3)2CH-Br 68
(CH3)3C-Br 65
These data show that the carbon-bromine bond is weakest when bromine is bound to a

Accepted Answer

A) methyl carbon. 
B) primary carbon. 
C) secondary carbon. 
D) tertiary carbon. 
E) quaternary carbon. 
A) methyl carbon. 
B) primary carbon. 
C) secondary carbon. 
D) tertiary carbon. 
E) quaternary carbon.

Question 17

Chlorination of methane can result in a mixture of chlorinated products.What experimental conditions should be used to favor the production of chloromethane over the other chlorinated products?

Accepted Answer

Make sure the molar

Question 18

When (R)-2-bromobutane reacts with Cl2/hv,which of the following is true?

Accepted Answer

A) Only I is formed. 
B) Only II is formed. 
C) I and II are formed in equal amounts. 
D) I and II are formed in unequal amounts. 
E) I and II could never form under these conditions. 
A) Only I is formed. 
B) Only II is formed. 
C) I and II are formed in equal amounts. 
D) I and II are formed in unequal amounts. 
E) I and II could never form under these conditions.

Question 19

Explain how CFCs are linked to depletion of stratospheric ozone.

Accepted Answer

CFCs are persistent in the environment u

Question 20

Identify as initiation,propagation,or termination.

Accepted Answer

A) initiation = b; propagation = a,c,g; termination = d,e,f 
B) initiation = c,d,e; propagation = b; termination = a,f 
C) initiation = b; propagation = c,d,e; termination = a,f 
D) initiation = b; propagation = a,f; termination = c,d,e 
E) initiation = a,f; propagation = c,d,e; termination = b 
A) initiation = b; propagation = a,c,g; termination = d,e,f 
B) initiation = c,d,e; propagation = b; termination = a,f 
C) initiation = b; propagation = c,d,e; termination = a,f 
D) initiation = b; propagation = a,f; termination = c,d,e 
E) initiation = a,f; propagation = c,d,e; termination = b

Exam 12: Radicals

Which of the following is the best description of propane,CH3CH2CH3,at room temperature?

Which of the following is the most stable radical?

Calculate the percentage of 1-chloro-3,4-dimethylheptane formed in the following reaction.

Fill in the empty boxes in the reaction scheme below.

In the free radical chlorination of ethane,the step in which the Cl radical abstracts a H atom from ethane is ________ and the transition state most closely resembles ________.

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

Rank the free radicals (I-III)shown below in order of decreasing stability (i.e.,from most stable to least stable).

A radical mechanism is postulated to occur when cyclohexene reacts under which of the following conditions?

How many distinct alkyl chlorides can be obtained from monochlorination of 2,3-dimethylpentane?

Provide the major organic product of the following reactions.

When (R)-2-bromobutane reacts with Cl2/hv,which of the following is true?

Provide the major organic product of the following reactions.

Provide the structure of semiquinone radical.

How many electrons are contained in the p orbital of the methyl radical?

During the free radical chlorination of methane,which of the following reactions has the lowest collision frequency?

Consider the bond dissociation energies listed below in kcal/mol. CH3-Br 70 CH3CH2-Br 68 (CH3)2CH-Br 68 (CH3)3C-Br 65 These data show that the carbon-bromine bond is weakest when bromine is bound to a

Chlorination of methane can result in a mixture of chlorinated products.What experimental conditions should be used to favor the production of chloromethane over the other chlorinated products?

When (R)-2-bromobutane reacts with Cl2/hv,which of the following is true?

Explain how CFCs are linked to depletion of stratospheric ozone.

Identify as initiation,propagation,or termination.

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

Which of the following is the best description of propane,CH₃CH₂CH₃,at room temperature?

In the free radical chlorination of ethane,the step in which the Cl radical abstracts a H atom from ethane is and the transition state most closely resembles .

When (R)-2-bromobutane reacts with Cl₂/hv,which of the following is true?

Consider the bond dissociation energies listed below in kcal/mol. CH₃-Br 70 CH₃CH₂-Br 68 (CH₃)₂CH-Br 68 (CH₃)₃C-Br 65 These data show that the carbon-bromine bond is weakest when bromine is bound to a

When (R)-2-bromobutane reacts with Cl₂/hv,which of the following is true?