Question 1

What reagent can be used to cleave a silyl ether protecting group?

Accepted Answer

A) NaOMe 
B) MeMgBr 
C) Bu4NF 
D) Pd/C 
A) NaOMe 
B) MeMgBr 
C) Bu4NF 
D) Pd/C

Question 2

What is the missing reagent in the reaction below?

Accepted Answer

A) NaBH4/CH3OH 
B) H2, Pd-C 
C) LiAlH4 then H2O 
D) MeMgBr then H2O 
A) NaBH4/CH3OH 
B) H2, Pd-C 
C) LiAlH4 then H2O 
D) MeMgBr then H2O

Question 3

If the starting material has no stereogenic centers, when carbonyl compounds are reduced with a reagent such as LiAlH4 or NaBH4 and a new stereogenic center is formed, what will the composition of the product mixture be?

Accepted Answer

A) Forms a racemic mixture of the two possible enantiomers 
B) Forms more of one enantiomer than another because of steric reactions around the carbonyl 
C) Forms more of one enantiomer than another depending on the temperature of the reaction 
D) Forms different products depending on the solvent used 
A) Forms a racemic mixture of the two possible enantiomers 
B) Forms more of one enantiomer than another because of steric reactions around the carbonyl 
C) Forms more of one enantiomer than another depending on the temperature of the reaction 
D) Forms different products depending on the solvent used

Question 4

Which reagent can be used to reduce the carbonyl in methyl vinyl ketone?

Accepted Answer

A) NaBH4/CH3OH 
B) H2 and Pd-C 
C) FeCl3  
D) NaH 
A) NaBH4/CH3OH 
B) H2 and Pd-C 
C) FeCl3  
D) NaH

Question 5

Which reagent can be used to reduce an acid chloride to an aldehyde?

Accepted Answer

A) NaBH4  
B) LiAlH(OtBu)3  
C) LiAlH4  
D) FeCl3  
A) NaBH4  
B) LiAlH(OtBu)3  
C) LiAlH4  
D) FeCl3

Question 6

What is the major organic product of the following reaction?

Accepted Answer

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

Question 7

What is the purpose of a silyl ether?

Accepted Answer

A) To protect esters from organometallic reagents and other reagents 
B) To protect ketones from organometallic reagents and other reagents 
C) To protect alcohols from organometallic reagents and other reagents 
D) To prevent the formation of carboxylic acids 
A) To protect esters from organometallic reagents and other reagents 
B) To protect ketones from organometallic reagents and other reagents 
C) To protect alcohols from organometallic reagents and other reagents 
D) To prevent the formation of carboxylic acids

Question 8

What is the product of the following reaction?

Accepted Answer

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

Question 9

What is the major organic product in the following sequence of reactions?

Accepted Answer

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

What reagent can be used to cleave a silyl ether protecting group?

What is the missing reagent in the reaction below?

If the starting material has no stereogenic centers, when carbonyl compounds are reduced with a reagent such as LiAlH₄ or NaBH₄ and a new stereogenic center is formed, what will the composition of the product mixture be?

Which reagent can be used to reduce the carbonyl in methyl vinyl ketone?

Which reagent can be used to reduce an acid chloride to an aldehyde?

What is the major organic product of the following reaction?

What is the purpose of a silyl ether?

What is the product of the following reaction?

What is the major organic product in the following sequence of reactions?

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

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Filters

Exam 20: Introduction to Carbonyl Chemistry;

What reagent can be used to cleave a silyl ether protecting group?

What is the missing reagent in the reaction below?

If the starting material has no stereogenic centers, when carbonyl compounds are reduced with a reagent such as LiAlH4 or NaBH4 and a new stereogenic center is formed, what will the composition of the product mixture be?

Which reagent can be used to reduce the carbonyl in methyl vinyl ketone?

Which reagent can be used to reduce an acid chloride to an aldehyde?

What is the major organic product of the following reaction?

What is the purpose of a silyl ether?

What is the product of the following reaction?

What is the major organic product in the following sequence of reactions?

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

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Filters

If the starting material has no stereogenic centers, when carbonyl compounds are reduced with a reagent such as LiAlH₄ or NaBH₄ and a new stereogenic center is formed, what will the composition of the product mixture be?