Question 1

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

Accepted Answer

1.HBr,pero

Question 2

How many distinct monochlorinated products,including stereoisomers,can result when the alkane below is heated in the presence of Cl2?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
E) 8 
A) 2 
B) 4 
C) 5 
D) 6 
E) 8

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

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 5

Which is more stable,a tertiary alkyl radical or a benzylic radical? Explain.

Accepted Answer

A benzylic radical is more sta

Question 6

Would chlorination or bromination of 2,5-dimethylhexane produce a greater yield of 1-halo-2,5-dimethylhexane?

Accepted Answer

The answer of Would chlorination or bromination of 2,5-dimethylhexane produce...

Question 7

Write an equation to describe the initiation step in the chlorination of methane.

Accepted Answer

Cl-Cl + ph

Question 8

Why are alkanes so unreactive?

Accepted Answer

They have only stron

Question 9

What role do vitamins C and E play in biological radical reactions?

Accepted Answer

Unwanted radicals in biological systems

Question 10

Which of the following is a chain propagation step in the free radical chlorination of methane?

Accepted Answer

A) CH4 + Cl ∙ → ∙ CH3 + HCl 
B) Cl2 → 2 Cl ∙ 
C) Cl ∙ + ∙ CH3 → CH3Cl 
D) ∙ CH3 + CH4 → CH4 + ∙CH3 
A) CH4 + Cl ∙ → ∙ CH3 + HCl 
B) Cl2 → 2 Cl ∙ 
C) Cl ∙ + ∙ CH3 → CH3Cl 
D) ∙ CH3 + CH4 → CH4 + ∙CH3

Question 11

Use the Hammond Postulate to explain why free radical brominations are more selective than free radical chlorinations.

Accepted Answer

The first propagation step in free radic

Question 12

Which of the following is the rate-determining step for the monobromination of cyclohexane?

Accepted Answer

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

Question 13

Which of the following is not an intermediate or product in the reaction of

Accepted Answer

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

Question 14

How would you convert 1-butene to 1-hexanol?

Accepted Answer

The answer of How would you convert 1-butene to 1-hexanol?...

Question 15

When 1,1,3,3-tetramethylcyclobutane is brominated at 125°C,the relative reactivity of the 1°: 2° :3° hydrogens is approximately 1: 82: 1600.Estimate the amount of each monobromination product.

Accepted Answer

primary br

Question 16

When Br ∙ reacts with 1-butene (CH3CH2CH   CH2),the hydrogen atom which is preferentially abstracted is the one which produces a resonance stabilized radical.Draw the major resonance contributing forms of this radical.

Accepted Answer

∙ ∙ CH₃CHCH

Question 17

How many dichlorinated products,including stereoisomers,can be isolated when (S)-2-chlorobutane reacts with Cl2/hv?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 18

Calculate the percentage of 3-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 19

Which of the following is involved in the depletion of ozone layer in the upper atmosphere?

Accepted Answer

A) fluoride radical 
B) chloride radical 
C) methyl radical 
D) ozone radical 
E) oxygen radical 
A) fluoride radical 
B) chloride radical 
C) methyl radical 
D) ozone radical 
E) oxygen radical

Question 20

NBS is frequently used in the bromination of allylic carbons to provide

Accepted Answer

A) high concentration of bromine needed for the reaction. 
B) low concentration of bromine needed for the reaction. 
C) high concentration of HBr needed for the reaction. 
D) low concentration of HBr needed for the reaction. 
E) B and D 
A) high concentration of bromine needed for the reaction. 
B) low concentration of bromine needed for the reaction. 
C) high concentration of HBr needed for the reaction. 
D) low concentration of HBr needed for the reaction. 
E) B and D

Exam 12: Radicals

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

How many distinct monochlorinated products,including stereoisomers,can result when the alkane below is heated in the presence of Cl2?

Provide the major organic product of the following reactions.

Which of the following is the most stable radical?

Which is more stable,a tertiary alkyl radical or a benzylic radical? Explain.

Would chlorination or bromination of 2,5-dimethylhexane produce a greater yield of 1-halo-2,5-dimethylhexane?

Write an equation to describe the initiation step in the chlorination of methane.

Why are alkanes so unreactive?

What role do vitamins C and E play in biological radical reactions?

Which of the following is a chain propagation step in the free radical chlorination of methane?

Use the Hammond Postulate to explain why free radical brominations are more selective than free radical chlorinations.

Which of the following is the rate-determining step for the monobromination of cyclohexane?

Which of the following is not an intermediate or product in the reaction of

How would you convert 1-butene to 1-hexanol?

When 1,1,3,3-tetramethylcyclobutane is brominated at 125°C,the relative reactivity of the 1°: 2° :3° hydrogens is approximately 1: 82: 1600.Estimate the amount of each monobromination product.

When Br ∙ reacts with 1-butene (CH3CH2CH CH2),the hydrogen atom which is preferentially abstracted is the one which produces a resonance stabilized radical.Draw the major resonance contributing forms of this radical.

How many dichlorinated products,including stereoisomers,can be isolated when (S)-2-chlorobutane reacts with Cl2/hv?

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

Which of the following is involved in the depletion of ozone layer in the upper atmosphere?

NBS is frequently used in the bromination of allylic carbons to provide

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

How many distinct monochlorinated products,including stereoisomers,can result when the alkane below is heated in the presence of Cl₂?

When Br ∙ reacts with 1-butene (CH₃CH₂CH CH₂),the hydrogen atom which is preferentially abstracted is the one which produces a resonance stabilized radical.Draw the major resonance contributing forms of this radical.

How many dichlorinated products,including stereoisomers,can be isolated when (S)-2-chlorobutane reacts with Cl₂/hv?