Question 1

Which of the following compounds is the major product when 1-hexyne is treated with excess HBr?

Accepted Answer

A) 1,1-dibromohexane 
B) 1,1-dibromohexene 
C) 1,2-dibromohexene 
D) 1,2-dibromohexane 
E) 2,2-dibromohexane 
A) 1,1-dibromohexane 
B) 1,1-dibromohexene 
C) 1,2-dibromohexene 
D) 1,2-dibromohexane 
E) 2,2-dibromohexane

Question 2

Which of the alkyne addition reactions below involves an enol intermediate?

Accepted Answer

A) hydroboration/oxidation 
B) treatment with HgSO4 in dilute H2SO4 
C) hydrogenation 
D) both A and B 
E) both A and C 
A) hydroboration/oxidation 
B) treatment with HgSO4 in dilute H2SO4 
C) hydrogenation 
D) both A and B 
E) both A and C

Question 3

What are the hybridizations of the carbon atoms numbered 1 and 2 respectively in the following structure?

Accepted Answer

A) sp3, sp2 
B) sp2, sp2 
C) sp, sp 
D) sp2, sp 
E) sp, sp2 
A) sp3, sp2 
B) sp2, sp2 
C) sp, sp 
D) sp2, sp 
E) sp, sp2

Question 4

Give the reagents for the following reaction.

Accepted Answer

1. NaNH₂, 2. CH₃CH₂Br,

Question 5

Give the systematic name of the compound shown below.

Accepted Answer

(S)-5-meth

Question 6

What are the hybridizations of the carbon atoms numbered 1 and 2 in the structure below? 1 2
H3C-CH   CH-C   C-H

Accepted Answer

A) sp3, sp2 
B) sp2, sp2 
C) sp2, sp 
D) sp, sp 
A) sp3, sp2 
B) sp2, sp2 
C) sp2, sp 
D) sp, sp

Question 7

Provide the structure of the major organic product of the following reaction.

Accepted Answer

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

Question 8

Which of the following statements correctly describes the general reactivity of alkynes?

Accepted Answer

A) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. 
B) The σ bonds of alkynes are higher in energy than the π bonds and are thus more reactive. 
C) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions. 
D) Alkynes are generally more reactive than alkenes. 
E) Alkynes react as electrophiles, whereas alkenes reacts as nucleophiles. 
A) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. 
B) The σ bonds of alkynes are higher in energy than the π bonds and are thus more reactive. 
C) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions. 
D) Alkynes are generally more reactive than alkenes. 
E) Alkynes react as electrophiles, whereas alkenes reacts as nucleophiles.

Question 9

Provide the major organic product in the reaction below.

Accepted Answer

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

Question 10

What is the IUPAC name for the following compound?

Accepted Answer

A) cis, trans-2, 4-heptadiene 
B) 2Z,4Z-2, 4-heptadiene 
C) cis, cis-2, 4-heptadiene 
D) trans, trans-2, 4-heptadiene 
E) 2E,4E-2, 4-heptadiene 
A) cis, trans-2, 4-heptadiene 
B) 2Z,4Z-2, 4-heptadiene 
C) cis, cis-2, 4-heptadiene 
D) trans, trans-2, 4-heptadiene 
E) 2E,4E-2, 4-heptadiene

Question 11

Which of the following is the best synthesis of 2, 2-dibromopropane

Accepted Answer

A)    
B)    
C) CH3C   CH   
D)    
E)    
A)    
B)    
C) CH3C   CH   
D)    
E)

Question 12

Provide the major organic product in the reaction below.

Accepted Answer

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

Question 13

Describe a sequence of reactions by which meso-2,3-dibromobutane can be prepared from propyne.

Accepted Answer

1) NaNH₂ 2)

Question 14

Provide the structure of the major organic produt that results when 2-butyne is treated with H2 in the presence of Lindlar's Catalyst.

Accepted Answer

Question 15

Provide the major organic product in the reaction below.

Accepted Answer

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

Question 16

Which is the correct order of decreasing acidity in the following compounds? H2O CH3CH3 NH3 CH2
    CH2 HC   CH
A B C D E

Accepted Answer

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

Question 17

What is the common name for the following alkyne?

Accepted Answer

A) neohexyne 
B) trimethylpropyne 
C) trimethylacetylene 
D) tert-butylacetylene 
E) isopropylacetylene 
A) neohexyne 
B) trimethylpropyne 
C) trimethylacetylene 
D) tert-butylacetylene 
E) isopropylacetylene

Question 18

Provide the systematic name of the compound shown.

Accepted Answer

(E)-5-meth

Question 19

What is the major product of the following reaction? HCl
CH3C   CH

Accepted Answer

A)    
B)    
C) CH3CH   CH-Cl 
D)    
E)    
A)    
B)    
C) CH3CH   CH-Cl 
D)    
E)

Question 20

Suggest a plausible scheme for the following synthesis

Accepted Answer

The answer of Suggest a plausible scheme for the following...

Exam 7: Reactions of Alkynes Introduction to Multistep Synthesis

Which of the following compounds is the major product when 1-hexyne is treated with excess HBr?

Which of the alkyne addition reactions below involves an enol intermediate?

What are the hybridizations of the carbon atoms numbered 1 and 2 respectively in the following structure?

Give the reagents for the following reaction.

Give the systematic name of the compound shown below.

What are the hybridizations of the carbon atoms numbered 1 and 2 in the structure below? 1 2 H3C-CH CH-C C-H

Provide the structure of the major organic product of the following reaction.

Which of the following statements correctly describes the general reactivity of alkynes?

Provide the major organic product in the reaction below.

What is the IUPAC name for the following compound?

Which of the following is the best synthesis of 2, 2-dibromopropane

Provide the major organic product in the reaction below.

Describe a sequence of reactions by which meso-2,3-dibromobutane can be prepared from propyne.

Provide the structure of the major organic produt that results when 2-butyne is treated with H2 in the presence of Lindlar's Catalyst.

Provide the major organic product in the reaction below.

Which is the correct order of decreasing acidity in the following compounds? H2O CH3CH3 NH3 CH2 CH2 HC CH A B C D E

What is the common name for the following alkyne?

Provide the systematic name of the compound shown.

What is the major product of the following reaction? HCl CH3C CH

Suggest a plausible scheme for the following synthesis

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Isomers: the Arrangement of Atoms in Space

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

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 Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Nucleosides, Nucleotides, and Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

What are the hybridizations of the carbon atoms numbered 1 and 2 in the structure below? 1 2 H₃C-CH CH-C C-H

Provide the structure of the major organic produt that results when 2-butyne is treated with H₂ in the presence of Lindlar's Catalyst.

Which is the correct order of decreasing acidity in the following compounds? H₂O CH₃CH₃ NH₃ CH₂ CH₂ HC CH A B C D E

What is the major product of the following reaction? HCl CH₃C CH