Question 1

What is the major product for the following reaction?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 2

What is the major product for the following reaction sequence?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above 
A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above

Question 3

The correct IUPAC name for the following compound is:

Accepted Answer

A)  2-Bromo-4-methylenehexane 
B)  2-(2-Bromopropyl)-1-butene 
C)  4-Bromo-2-ethyl-1-pentene 
D)  2-Bromo-4-ethyl-1-pentene 
E)  2-Bromo-4-ethyl-4-pentene 
A)  2-Bromo-4-methylenehexane 
B)  2-(2-Bromopropyl)-1-butene 
C)  4-Bromo-2-ethyl-1-pentene 
D)  2-Bromo-4-ethyl-1-pentene 
E)  2-Bromo-4-ethyl-4-pentene

Question 4

Which would be the major product of the following reaction sequence?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above 
A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above

Question 5

Given:   One can conclude that X has:

Accepted Answer

A)  no rings and no double bonds. 
B)  no rings and one double bond. 
C)  one ring and one double bond. 
D)  two rings and no double bonds. 
E)  one triple bond. 
A)  no rings and no double bonds. 
B)  no rings and one double bond. 
C)  one ring and one double bond. 
D)  two rings and no double bonds. 
E)  one triple bond.

Question 6

Which of these is the most satisfactory method for the preparation of cis-2-pentene?

Accepted Answer

A)  CH3CHBrCH2CH2CH3 + (CH3)3COK/(CH3)3COH 
B)  CH3C$ \equiv$CCH2CH3 + H2,Pt 
C)  CH3C$ \equiv$CCH2CH3 + H2,Ni2B (P-2) 
D)  CH3C$ \equiv$CH2CH3 + Li/liq.NH3 
E)  CH3CH2CHBrCH2CH3 + CH3CH2ONa/CH3CH2OH 
A)  CH3CHBrCH2CH2CH3 + (CH3)3COK/(CH3)3COH 
B)  CH3C$ \equiv$CCH2CH3 + H2,Pt 
C)  CH3C$ \equiv$CCH2CH3 + H2,Ni2B (P-2) 
D)  CH3C$ \equiv$CH2CH3 + Li/liq.NH3 
E)  CH3CH2CHBrCH2CH3 + CH3CH2ONa/CH3CH2OH

Question 7

Which alcohol would be most easily dehydrated?

Accepted Answer

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

Question 8

How will you prepare cis-1,2-dimethylcyclohexane from 1,2-dimethylcyclohexene?

Accepted Answer

Catalytic

Question 9

In hydrogenation reactions,both hydrogen atoms add to the pi system from the same face of the molecule.This is an example of a(n)_________ addition.

Accepted Answer

The answer of In hydrogenation reactions,both hydrogen atoms add to...

Question 10

Dehydration of alcohols requires a __________________ catalyst.

Accepted Answer

The answer of Dehydration of alcohols requires a __________________ catalyst....

Question 11

Your task is to convert 2-bromobutane to 1-butene in highest yield.Which reagents would you use?

Accepted Answer

A)  KOH/H2O 
B)  KOH/CH3OH 
C)  CH3ONa/CH3OH 
D)  CH3CH2ONa/CH3CH2OH 
E)  (CH3)3COK/(CH3)3COH 
A)  KOH/H2O 
B)  KOH/CH3OH 
C)  CH3ONa/CH3OH 
D)  CH3CH2ONa/CH3CH2OH 
E)  (CH3)3COK/(CH3)3COH

Question 12

What is the major product for the following reaction sequence?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above 
A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above

Question 13

An unknown compound,B,has the molecular formula C7H12.On catalytic hydrogenation 1 mol of B absorbs 2 mol of hydrogen and yields 2-methylhexane.B has significant IR absorption band at about 3300 and 2200 cm-1.Which compound best represents B?

Accepted Answer

A)  3-methyl-1-hexyne 
B)  5-methyl-2-hexyne 
C)  5-methyl-1,3-hexadiene 
D)  5-methyl-1-hexyne 
E)  2-methyl-1,5-hexadiene 
A)  3-methyl-1-hexyne 
B)  5-methyl-2-hexyne 
C)  5-methyl-1,3-hexadiene 
D)  5-methyl-1-hexyne 
E)  2-methyl-1,5-hexadiene

Question 14

What is the major product of the reaction of the following reaction?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  More than one of the above 
A) 
  
B) 
  
C) 
  
D) 
  
E)  More than one of the above

Question 15

What is the major product for the following reaction sequence?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above 
A) 
  
B) 
  
C) 
  
D) 
  
E)  None of the above

Question 16

Which reaction would not primarily proceed via an SN2 mechanism?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E)  All of them proceed via SN2 
A) 
  
B) 
  
C) 
  
D) 
  
E)  All of them proceed via SN2

Question 17

Which alkene would you expect to be the major product of the following dehydration?

Accepted Answer

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

Question 18

What is the major product for the following reaction sequence?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 19

Which product(s)would be produced by acid-catalyzed dehydration of 2-methyl-2-pentanol?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 20

In a dehydration reaction,the leaving group is _______________.

Accepted Answer

The answer of In a dehydration reaction,the leaving group is...

Exam 7: Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

What is the major product for the following reaction?

What is the major product for the following reaction sequence?

The correct IUPAC name for the following compound is:

Which would be the major product of the following reaction sequence?

Given: One can conclude that X has:

Which of these is the most satisfactory method for the preparation of cis-2-pentene?

Which alcohol would be most easily dehydrated?

How will you prepare cis-1,2-dimethylcyclohexane from 1,2-dimethylcyclohexene?

In hydrogenation reactions,both hydrogen atoms add to the pi system from the same face of the molecule.This is an example of a(n)_________ addition.

Dehydration of alcohols requires a __________________ catalyst.

Your task is to convert 2-bromobutane to 1-butene in highest yield.Which reagents would you use?

What is the major product for the following reaction sequence?

An unknown compound,B,has the molecular formula C7H12.On catalytic hydrogenation 1 mol of B absorbs 2 mol of hydrogen and yields 2-methylhexane.B has significant IR absorption band at about 3300 and 2200 cm-1.Which compound best represents B?

What is the major product of the reaction of the following reaction?

What is the major product for the following reaction sequence?

Which reaction would not primarily proceed via an SN2 mechanism?

Which alkene would you expect to be the major product of the following dehydration?

What is the major product for the following reaction sequence?

Which product(s)would be produced by acid-catalyzed dehydration of 2-methyl-2-pentanol?

In a dehydration reaction,the leaving group is _______________.

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

An unknown compound,B,has the molecular formula C₇H₁₂.On catalytic hydrogenation 1 mol of B absorbs 2 mol of hydrogen and yields 2-methylhexane.B has significant IR absorption band at about 3300 and 2200 cm^-1.Which compound best represents B?

Which reaction would not primarily proceed via an S_N2 mechanism?