Question 1

Which of the following indicated C-C bond is the longest?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  both I& II 
A)  I 
B)  II 
C)  III 
D)  both I& II

Question 2

Predict the major product for the following reaction.

Accepted Answer

The answer of Predict the major product for the following...

Question 3

Which diene and dienophile would react to give the following Diels-Alder product?

Accepted Answer

The answer of Which diene and dienophile would react to...

Question 4

Which of the following compounds has the shortest $\lambda$max?

Accepted Answer

A)  I 
B)  II 
C) .III 
D) .IV 
A)  I 
B)  II 
C) .III 
D) .IV

Question 5

Provide the reagents necessary to carry out the following conversion.

Accepted Answer

1. NBS,hea

Question 6

Which of the following compounds has the longest $\lambda$max?

Accepted Answer

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

Question 7

Which of the following is most useful to study conjugation in organic compounds?

Accepted Answer

A)  IR spectroscopy 
B)  NMR spectroscopy 
C)  Mass spectroscopy 
D)  UV-Vis spectroscopy 
E)  Raman spectroscopy 
A)  IR spectroscopy 
B)  NMR spectroscopy 
C)  Mass spectroscopy 
D)  UV-Vis spectroscopy 
E)  Raman spectroscopy

Question 8

Which diene and dienophile would react to give the following Diels-Alder product?

Accepted Answer

The answer of Which diene and dienophile would react to...

Question 9

Which one of the following dienes will have the highest heat of hydrogenation?

Accepted Answer

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

Question 10

Provide the structure of the 1,2 addition product for the following reaction.

Accepted Answer

The answer of Provide the structure of the 1,2 addition...

Question 11

Provide the structure for (E)-1,3-pentadiene.

Accepted Answer

The answer of Provide the structure for (E)-1,3-pentadiene....

Question 12

Predict the product for the following Cope rearrangement.

Accepted Answer

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

Question 13

Which of the following compounds has the longest $\lambda$max?

Accepted Answer

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

Question 14

Which of the following best describes the stereochemistry of ring closure and the product for the following reaction?

Accepted Answer

A)  disrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
B)  conrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
C)  disrotatory, trans-5,6-diethyl-1,3-cyclohexadiene 
D)  conrotatory, trans -5,6-diethyl-1,3-cyclohexadiene 
A)  disrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
B)  conrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
C)  disrotatory, trans-5,6-diethyl-1,3-cyclohexadiene 
D)  conrotatory, trans -5,6-diethyl-1,3-cyclohexadiene

Question 15

Which one of the following dienes is least stable?

Accepted Answer

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

Question 16

Which of the following best describes the stereochemistry of ring closure and the product for the following reaction?

Accepted Answer

A)  disrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
B)  conrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
C)  disrotatory, trans-5,6-diethyl-1,3-cyclohexadiene 
D)  conrotatory, trans -5,6-diethyl-1,3-cyclohexadiene 
A)  disrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
B)  conrotatory, cis-5,6-diethyl-1,3-cyclohexadiene 
C)  disrotatory, trans-5,6-diethyl-1,3-cyclohexadiene 
D)  conrotatory, trans -5,6-diethyl-1,3-cyclohexadiene

Question 17

Predict the product for the following electrocyclic reaction.

Accepted Answer

The answer of Predict the product for the following electrocyclic...

Question 18

Which of the following compounds is (are) a conjugated diene(s)?

Accepted Answer

A)  4-methyl-1,3-heptadiene 
B)  3-methyl-1,5-heptadiene 
C)  2-methyl-2,4-heptadiene 
D)  4-methyl-1,4-heptadiene 
E)  5-methyl-2,3-heptadiene 
A)  4-methyl-1,3-heptadiene 
B)  3-methyl-1,5-heptadiene 
C)  2-methyl-2,4-heptadiene 
D)  4-methyl-1,4-heptadiene 
E)  5-methyl-2,3-heptadiene

Question 19

Which diene and dienophile would react to give the following Diels-Alder product?

Accepted Answer

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

Question 20

Predict the product for the following electrocyclic reaction.

Accepted Answer

The answer of Predict the product for the following electrocyclic...

Exam 17: Conjugated Pi Systems and Pericyclic Reactions

Which of the following indicated C-C bond is the longest?

Predict the major product for the following reaction.

Which diene and dienophile would react to give the following Diels-Alder product?

Which of the following compounds has the shortest λ\lambdaλ max?

Provide the reagents necessary to carry out the following conversion.

Which of the following compounds has the longest λ\lambdaλ max?

Which of the following is most useful to study conjugation in organic compounds?

Which diene and dienophile would react to give the following Diels-Alder product?

Which one of the following dienes will have the highest heat of hydrogenation?

Provide the structure of the 1,2 addition product for the following reaction.

Provide the structure for (E)-1,3-pentadiene.

Predict the product for the following Cope rearrangement.

Which of the following compounds has the longest λ\lambdaλ max?

Which of the following best describes the stereochemistry of ring closure and the product for the following reaction?

Which one of the following dienes is least stable?

Which of the following best describes the stereochemistry of ring closure and the product for the following reaction?

Predict the product for the following electrocyclic reaction.

Which of the following compounds is (are) a conjugated diene(s)?

Which diene and dienophile would react to give the following Diels-Alder product?

Predict the product for the following electrocyclic reaction.

A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Chemical Reactivity and Mechanisms

Substitution Reactions

Alkenes: Structure and Preparation Via Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Carbohydrates

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Which of the following compounds has the shortest $\lambda$ _max? $Which of the following compounds has the shortest \lambda <sub>max</sub>?$

Which of the following compounds has the longest $\lambda$ _max? $Which of the following compounds has the longest \lambda <sub>max</sub>?$

Which of the following compounds has the longest $\lambda$ _max? $Which of the following compounds has the longest \lambda <sub>max</sub>?$