Question 1

Explain why HC   N is a stronger acid than HC   CH.

Accepted Answer

Because nitrogen is

Question 2

Draw both enol forms of the following molecule.

Accepted Answer

The answer of Draw both enol forms of the following...

Question 3

An optically active compound (A),C6H10,reacts with H2/Ni to produce compound (B),C6H14.(B)is optically inactive.Deduce the structures of (A)and (B).

Accepted Answer

Question 4

The pi-bonds in ethyne is formed by

Accepted Answer

A) end-to-end sp-sp overlap 
B) side-to-side sp-sp overlap 
C) end-to-end s-sp overlap 
D) end-to-end p-p overlap 
E) side-to-side p-p overlap 
A) end-to-end sp-sp overlap 
B) side-to-side sp-sp overlap 
C) end-to-end s-sp overlap 
D) end-to-end p-p overlap 
E) side-to-side p-p overlap

Question 5

How many distinct terminal alkynes exist with a molecular formula of C5H8?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 6

Provide the major organic product in the reaction below.

Accepted Answer

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

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

Provide the structure of the major organic product that results when 2-butyne is treated with HgSO4/H2SO4 in water.

Accepted Answer

Question 9

Provide the structure of the major organic product(s)in the reaction below.

Accepted Answer

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

Question 10

Provide the major organic product of the following reaction sequence.

Accepted Answer

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

Question 11

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

Accepted Answer

2,5,5-trim

Question 12

Suggest a plausible scheme for the following synthesis

Accepted Answer

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

Question 13

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 14

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 15

What are the products of the following reaction? CH3OH + CH3C   C-Na+ → ?

Accepted Answer

A) CH3C   CCH3 + NaOH 
B) CH3C   COCH3 + NaOH 
C) CH3C   CH + CH3O-Na+ 
D) CH3OC   CH + NaCH3 
E) no reaction 
A) CH3C   CCH3 + NaOH 
B) CH3C   COCH3 + NaOH 
C) CH3C   CH + CH3O-Na+ 
D) CH3OC   CH + NaCH3 
E) no reaction

Question 16

Give the major organic product for the reaction.

Accepted Answer

A)    
B)    
C)    
D) CH3CH2CH2CH   CHOH 
E)    
A)    
B)    
C)    
D) CH3CH2CH2CH   CHOH 
E)

Question 17

Dissolving metal reduction involves

Accepted Answer

A) addition of H2O to a triple bond in the presence of Na in liquid NH3 
B) addition of H2 to a triple bond in the presence of Na in liquid NH3 
C) addition of H2O to a triple bond in the presence of NaNH2 in liquid NH3 
D) addition of H2 to a triple bond in the presence of NaNH2 in liquid NH3 
E) both B and D 
A) addition of H2O to a triple bond in the presence of Na in liquid NH3 
B) addition of H2 to a triple bond in the presence of Na in liquid NH3 
C) addition of H2O to a triple bond in the presence of NaNH2 in liquid NH3 
D) addition of H2 to a triple bond in the presence of NaNH2 in liquid NH3 
E) both B and D

Question 18

How many distinct internal alkynes exist with a molecular formula of C6H10?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 19

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 20

Provide the major organic product in the reaction below.

Accepted Answer

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

Exam 7: The Reactions of Alkynes - Introduction to Multistep Synthesis

Explain why HC N is a stronger acid than HC CH.

Draw both enol forms of the following molecule.

An optically active compound (A),C6H10,reacts with H2/Ni to produce compound (B),C6H14.(B)is optically inactive.Deduce the structures of (A)and (B).

The pi-bonds in ethyne is formed by

How many distinct terminal alkynes exist with a molecular formula of C5H8?

Provide the major organic product in the reaction below.

Give the major organic product for the reaction.

Provide the structure of the major organic product that results when 2-butyne is treated with HgSO4/H2SO4 in water.

Provide the structure of the major organic product(s)in the reaction below.

Provide the major organic product of the following reaction sequence.

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

Suggest a plausible scheme for the following synthesis

What is the common name for the following alkyne?

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

What are the products of the following reaction? CH3OH + CH3C C-Na+ → ?

Give the major organic product for the reaction.

Dissolving metal reduction involves

How many distinct internal alkynes exist with a molecular formula of C6H10?

Give the best reagents for the reaction.

Provide the major organic product in the reaction below.

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds: Nomenclature, physical Properties, and Structure

Isomers: the Arrangement of Atoms in Space

Alkenes: Structure,nomenclature,and an Introduction to Reactivity - Thermodynamics and Kinetics

The Reactions of Alkenes - the Stereochemistry of Addition Reactions

Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

Substitution and Elimination Reactions of Alkyl Halides

Reactions of Alcohols, ethers, epoxides, amines and Sulfur-Containing Compounds

Organometallic Compounds

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 Α-Carbon

Reactions of Benzene and Substituted Benzenes

More About Amines - Reactions of Heterocylic Compounds

The Organic Chemistry of Carbohydrates

Amino Acids,peptides,and Proteins

Catalysis in Organic Reactions and in Enzymatic Reactions

The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

The Organic Chemistry of the Metabolic Pathways

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

An optically active compound (A),C₆H₁₀,reacts with H₂/Ni to produce compound (B),C₆H₁₄.(B)is optically inactive.Deduce the structures of (A)and (B).

How many distinct terminal alkynes exist with a molecular formula of C₅H₈?

Provide the structure of the major organic product that results when 2-butyne is treated with HgSO₄/H₂SO₄ in water.

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

What are the products of the following reaction? CH₃OH + CH₃C C^-Na⁺ → ?

How many distinct internal alkynes exist with a molecular formula of C₆H₁₀?