Question 1

Provide the major organic product of the following Diels-Alder cycloaddition.

Accepted Answer

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

Question 2

Fill in the empty boxes.

Accepted Answer

The answer of Fill in the empty boxes.  ...

Question 3

Provide the major organic product of the following Diels-Alder cycloaddition.

Accepted Answer

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

Question 4

Draw the structure of the major organic product of the following reaction.Is the product chiral or achiral?

Accepted Answer

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

Question 5

Which of the following statements best describes the theory of Conservation of Orbital Symmetry?

Accepted Answer

A) Molecular orbital of the transition state must be similar to that of the reactant. 
B) Molecular orbital of the transition state must be similar to that of the product. 
C) Only s orbitals from reactants and products are utilized. 
D) Molecular orbitals of reactant and product must have similar symmetry. 
E) Molecular orbitals of reactant and product must have different symmetry. 
A) Molecular orbital of the transition state must be similar to that of the reactant. 
B) Molecular orbital of the transition state must be similar to that of the product. 
C) Only s orbitals from reactants and products are utilized. 
D) Molecular orbitals of reactant and product must have similar symmetry. 
E) Molecular orbitals of reactant and product must have different symmetry.

Question 6

What is the major product of the following reaction?

Accepted Answer

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

Question 7

Provide the major organic product of the following Diels-Alder cycloaddition.

Accepted Answer

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

Question 8

Electrocyclic reactions are reversible.The cyclic compound is favored for electrocyclic reactions that form six-membered rings,whereas the open-chain compound is favored for reactions that form four-membered rings.Explain thoroughly in terms of the enthalpy changes that are occurring.

Accepted Answer

In general,the cyclic compound is favore

Question 9

Why does the diene shown below fail to undergo a Diels-Alder reaction with even the most reactive dienophiles?

Accepted Answer

The diene cannot ach

Question 10

What is/are the product(s)of the following 1,3-hydrogen shift?

Accepted Answer

A) I 
B) II 
C) III 
D) I and II 
E) I and III 
A) I 
B) II 
C) III 
D) I and II 
E) I and III

Question 11

What is the major product of the following reaction?

Accepted Answer

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

Question 12

Predict the product of this reaction.

Accepted Answer

The answer of Predict the product of this reaction. ...

Question 13

What is meant by frontier orbitals?

Accepted Answer

Frontier orbitals are the two

Question 14

Under thermal conditions,is an [8+2] cycloaddition suprafacial or antarafacial?

Accepted Answer

The answer of Under thermal conditions,is an [8+2] cycloaddition suprafacial...

Question 15

Give the conditions for 1,3-hydrogen shifts.You may choose more than one answer.

Accepted Answer

A) suprafacial rearrangement 
B) antarafacial rearrangement 
C) thermal conditions 
D) photochemical conditions 
E) all of the above 
A) suprafacial rearrangement 
B) antarafacial rearrangement 
C) thermal conditions 
D) photochemical conditions 
E) all of the above

Question 16

Fill in the empty boxes.

Accepted Answer

Diels-Alde

Question 17

Through what type of single pericyclic reaction did the reaction shown below proceed?

Accepted Answer

A) [1,2] sigmatropic hydrogen migration 
B) [1,3] sigmatropic hydrogen migration 
C) [1,4] sigmatropic hydrogen migration 
D) [1,5] sigmatropic hydrogen migration 
E) none of the above 
A) [1,2] sigmatropic hydrogen migration 
B) [1,3] sigmatropic hydrogen migration 
C) [1,4] sigmatropic hydrogen migration 
D) [1,5] sigmatropic hydrogen migration 
E) none of the above

Question 18

Give the product(s)for the following reaction.

Accepted Answer

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

Question 19

Which of the following statements about the product of the electrocyclic ring closure below is correct?

Accepted Answer

A) The methyl groups are trans in the product. 
B) The product arose from a stereospecific,conrotatory ring closure. 
C) The product mixture is optically active. 
D) both B and C 
E) all of the above 
A) The methyl groups are trans in the product. 
B) The product arose from a stereospecific,conrotatory ring closure. 
C) The product mixture is optically active. 
D) both B and C 
E) all of the above

Question 20

Which of the following best describes the sigmatropic rearrangement that occurs in the reaction shown below?

Accepted Answer

A) [1,3] sigmatropic rearrangement 
B) [2,3] sigmatropic rearrangement 
C) [3,3] sigmatropic rearrangement 
D) [1,5] sigmatropic rearrangement 
E) [1,4] sigmatropic rearrangement 
A) [1,3] sigmatropic rearrangement 
B) [2,3] sigmatropic rearrangement 
C) [3,3] sigmatropic rearrangement 
D) [1,5] sigmatropic rearrangement 
E) [1,4] sigmatropic rearrangement

Exam 28: Pericyclic Reactions

Provide the major organic product of the following Diels-Alder cycloaddition.

Fill in the empty boxes.

Provide the major organic product of the following Diels-Alder cycloaddition.

Draw the structure of the major organic product of the following reaction.Is the product chiral or achiral?

Which of the following statements best describes the theory of Conservation of Orbital Symmetry?

What is the major product of the following reaction?

Provide the major organic product of the following Diels-Alder cycloaddition.

Electrocyclic reactions are reversible.The cyclic compound is favored for electrocyclic reactions that form six-membered rings,whereas the open-chain compound is favored for reactions that form four-membered rings.Explain thoroughly in terms of the enthalpy changes that are occurring.

Why does the diene shown below fail to undergo a Diels-Alder reaction with even the most reactive dienophiles?

What is/are the product(s)of the following 1,3-hydrogen shift?

What is the major product of the following reaction?

Predict the product of this reaction.

What is meant by frontier orbitals?

Under thermal conditions,is an [8+2] cycloaddition suprafacial or antarafacial?

Give the conditions for 1,3-hydrogen shifts.You may choose more than one answer.

Fill in the empty boxes.

Through what type of single pericyclic reaction did the reaction shown below proceed?

Give the product(s)for the following reaction.

Which of the following statements about the product of the electrocyclic ring closure below is correct?

Which of the following best describes the sigmatropic rearrangement that occurs in the reaction shown 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

The Reactions of Alkynes - Introduction to Multistep Synthesis

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

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