Question 1

What is the missing reactant in the following reaction?

Accepted Answer

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

Question 2

Why is the Grubbs catalyst synthetically important?

Accepted Answer

A) Because it only requires dilute concentrations of the reactants 
B) Because it produces only stereospecific products 
C) Because it produces only stereoselective products 
D) Because it provides a synthetic pathway for ring-closing metathesis reactions 
A) Because it only requires dilute concentrations of the reactants 
B) Because it produces only stereospecific products 
C) Because it produces only stereoselective products 
D) Because it provides a synthetic pathway for ring-closing metathesis reactions

Question 3

Which statement below best explains what is meant by the statement,"An organocuprate reaction with a vinyl halide is stereospecific"?

Accepted Answer

A) The reaction of a specific stereoisomer with the R2CuLi reagent will yield that particular stereoisomer as the product. 
B) The reaction of a vinyl halide with the R2CuLi reagent will only yield the cis product. 
C) The reaction of a vinyl halide with the R2CuLi reagent will only yield the trans product. 
D) The reaction of a vinyl halide with the R2CuLi reagent will only yield one enantiomer product-either R or S configuration. 
A) The reaction of a specific stereoisomer with the R2CuLi reagent will yield that particular stereoisomer as the product. 
B) The reaction of a vinyl halide with the R2CuLi reagent will only yield the cis product. 
C) The reaction of a vinyl halide with the R2CuLi reagent will only yield the trans product. 
D) The reaction of a vinyl halide with the R2CuLi reagent will only yield one enantiomer product-either R or S configuration.

Question 4

What do the Suzuki reaction,the Heck reaction,and the organocuprate reaction all have in common when they react with an alkyl halide?

Accepted Answer

A) All reactions form new carbon-carbon bonds. 
B) They all use palladium as a catalyst in one step of the reaction. 
C) They are all stereospecific reactions. 
D) They all require harsh conditions. 
A) All reactions form new carbon-carbon bonds. 
B) They all use palladium as a catalyst in one step of the reaction. 
C) They are all stereospecific reactions. 
D) They all require harsh conditions.

Question 5

Which of the following descriptions does not apply to methylene?

Accepted Answer

A) Methylene is sp2 hybridized. 
B) Methylene is a neutral,reactive intermediate. 
C) Methylene is a radical intermediate. 
D) The formula of methylene is :CH2. 
A) Methylene is sp2 hybridized. 
B) Methylene is a neutral,reactive intermediate. 
C) Methylene is a radical intermediate. 
D) The formula of methylene is :CH2.

Question 6

Identify the structure of the organic product Y formed in the following reaction sequence.

Accepted Answer

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

Question 7

Many of the reactions studied in this chapter are stereospecific.Why are stereospecific reactions important?

Accepted Answer

A) When a reaction produces a mixture of enantiomers,it is often very difficult to separate them.A mixture of products is often not useful. 
B) Often stereoisomers of a particular compound will have very different biological effects on an organism.Only one isomer is biologically helpful,and the other may be harmful. 
C) Often only one stereoisomer is biologically active,and coupling reactions are often used for the production of biological materials. 
D) All of the choices are true. 
A) When a reaction produces a mixture of enantiomers,it is often very difficult to separate them.A mixture of products is often not useful. 
B) Often stereoisomers of a particular compound will have very different biological effects on an organism.Only one isomer is biologically helpful,and the other may be harmful. 
C) Often only one stereoisomer is biologically active,and coupling reactions are often used for the production of biological materials. 
D) All of the choices are true.

What is the missing reactant in the following reaction?

Why is the Grubbs catalyst synthetically important?

Which statement below best explains what is meant by the statement,"An organocuprate reaction with a vinyl halide is stereospecific"?

What do the Suzuki reaction,the Heck reaction,and the organocuprate reaction all have in common when they react with an alkyl halide?

Which of the following descriptions does not apply to methylene?

Identify the structure of the organic product Y formed in the following reaction sequence.

Many of the reactions studied in this chapter are stereospecific.Why are stereospecific reactions important?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation, resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives - Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Molecular Ion Peaks and Fragmentation Patterns

Analyzing Molecular Motion and Infrared Spectroscopy

Organic Spectroscopy Concepts

Filters

Exam 24: Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

What is the missing reactant in the following reaction?

Why is the Grubbs catalyst synthetically important?

Which statement below best explains what is meant by the statement,"An organocuprate reaction with a vinyl halide is stereospecific"?

What do the Suzuki reaction,the Heck reaction,and the organocuprate reaction all have in common when they react with an alkyl halide?

Which of the following descriptions does not apply to methylene?

Identify the structure of the organic product Y formed in the following reaction sequence.

Many of the reactions studied in this chapter are stereospecific.Why are stereospecific reactions important?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation, resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives - Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Molecular Ion Peaks and Fragmentation Patterns

Analyzing Molecular Motion and Infrared Spectroscopy

Organic Spectroscopy Concepts

Filters