Question 1

Give the IUPAC name for (CH3)2C(CH2CH3)CCCH(CH3)2.

Accepted Answer

2,5,5-trim

Question 2

Why are terminal alkynes more acidic than other hydrocarbons?

Accepted Answer

The carbanion which results upon deproto

Question 3

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 4

The carbon-carbon triple bond of an alkyne is composed of ________.

Accepted Answer

A) three σ bonds 
B) two σ bonds and one π bond 
C) one σ bond and two π bonds 
D) three π bonds 
A) three σ bonds 
B) two σ bonds and one π bond 
C) one σ bond and two π bonds 
D) three π bonds

Question 5

Provide the structure of all distinct terminal alkynes with a molecular formula of C6H10.

Accepted Answer

Question 6

In the reduction of alkynes using sodium in liquid ammonia, which of the species below is not an intermediate in the commonly accepted mechanism?

Accepted Answer

A) vinyl anion 
B) vinyl radical 
C) radical anion 
D) vinyl cation 
A) vinyl anion 
B) vinyl radical 
C) radical anion 
D) vinyl cation

Question 7

Give the major organic product for the reaction.

Accepted Answer

A) CH3CH2CH2CH2CH3 
B)    
C)    
D)    
E)    
A) CH3CH2CH2CH2CH3 
B)    
C)    
D)    
E)

Question 8

The reagent needed to convert 2-butyne to trans-2-butene is ________.

Accepted Answer

A) H2/Pt 
B) H2/Lindlar's catalyst 
C) Li/NH3 
D) Na/NH3 
E) C or D 
A) H2/Pt 
B) H2/Lindlar's catalyst 
C) Li/NH3 
D) Na/NH3 
E) C or D

Question 9

Give the best reagents for the reaction.

Accepted Answer

A) H2SO4, HgSO4, HgSO4 
B) 1) disiamylborane, 2. HO-, H2O, H2O2 
C) K2Cr2O7, H+ 
D) NaOCl 
E) H2, Pd 
A) H2SO4, HgSO4, HgSO4 
B) 1) disiamylborane, 2. HO-, H2O, H2O2 
C) K2Cr2O7, H+ 
D) NaOCl 
E) H2, Pd

Question 10

Name the following compound.

Accepted Answer

cis-4,5-dimethyl-4-h

Question 11

Complete the following reaction.

Accepted Answer

The answer of Complete the following reaction.  ...

Question 12

Which of the following are enol forms of 2-butanone,

Accepted Answer

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

Question 13

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 14

Which of the following is the final and major product of this reaction?

Accepted Answer

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

Question 15

Which of the following improperly describes the physical properties of an alkyne?

Accepted Answer

A) relatively nonpolar 
B) nearly insoluble in water 
C) less dense than water 
D) insoluble in most organic solvents 
A) relatively nonpolar 
B) nearly insoluble in water 
C) less dense than water 
D) insoluble in most organic solvents

Question 16

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 17

Give the best reagents for the reaction.

Accepted Answer

A) H2, Pd 
B) 1) LiAlH4, 2. H3O+ 
C) 1) NaBH4, 2. H3O+ 
D) H2, Lindlar catalyst 
E) Na, NH3 
A) H2, Pd 
B) 1) LiAlH4, 2. H3O+ 
C) 1) NaBH4, 2. H3O+ 
D) H2, Lindlar catalyst 
E) Na, NH3

Question 18

In the addition of hydrogen bromide to alkynes in the absence of peroxides, which of the following species is believed to be an intermediate?

Accepted Answer

A) vinyl anion 
B) vinyl cation 
C) vinyl radical 
D) carbene 
E) bromonium ion 
A) vinyl anion 
B) vinyl cation 
C) vinyl radical 
D) carbene 
E) bromonium ion

Question 19

What is/are the major organic product(s)of the following reaction?

Accepted Answer

A) CH2     CH2 + HC   CH 
B) CH3CH2C   CH 
C) HC   CBr 
D) HC   CCH2CH2Br 
E) CH3C   CCH3 
A) CH2     CH2 + HC   CH 
B) CH3CH2C   CH 
C) HC   CBr 
D) HC   CCH2CH2Br 
E) CH3C   CCH3

Question 20

Provide the major organic product of the following reaction sequence.

Accepted Answer

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

Exam 7: Reactions of Alkynes Introduction to Multistep Synthesis

Give the IUPAC name for (CH3)2C(CH2CH3)CCCH(CH3)2.

Why are terminal alkynes more acidic than other hydrocarbons?

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

The carbon-carbon triple bond of an alkyne is composed of ________.

Provide the structure of all distinct terminal alkynes with a molecular formula of C6H10.

In the reduction of alkynes using sodium in liquid ammonia, which of the species below is not an intermediate in the commonly accepted mechanism?

Give the major organic product for the reaction.

The reagent needed to convert 2-butyne to trans-2-butene is ________.

Give the best reagents for the reaction.

Name the following compound.

Complete the following reaction.

Which of the following are enol forms of 2-butanone,

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

Which of the following is the final and major product of this reaction?

Which of the following improperly describes the physical properties of an alkyne?

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

Give the best reagents for the reaction.

In the addition of hydrogen bromide to alkynes in the absence of peroxides, which of the following species is believed to be an intermediate?

What is/are the major organic product(s)of the following reaction?

Provide the major organic product of the following reaction sequence.

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

Give the IUPAC name for (CH₃)₂C(CH₂CH₃)CCCH(CH₃)₂.

Provide the structure of all distinct terminal alkynes with a molecular formula of C₆H₁₀.