Question 1

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 2

Which major product(s) are formed for the following reaction?

Accepted Answer

A)  I & V 
B)  II & IV 
C)  III & IV 
D)  I, III & VI 
E)  II, IV & V 
A)  I & V 
B)  II & IV 
C)  III & IV 
D)  I, III & VI 
E)  II, IV & V

Question 3

Which of the following compounds is (are) a cumulated 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 4

Use Woodward-Fieser rules to estimate the $\lambda$max for the following compound.

Accepted Answer

The answer of Use Woodward-Fieser rules to estimate the $\lambda$max...

Question 5

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

Accepted Answer

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

Question 6

Rank the indicted C-C bonds in increasing order of bond length (shortest to longest)

Accepted Answer

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

Question 7

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 8

Which of the following dienes can undergo the Diels-Alder reaction?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All of the these 
A) I 
B) II 
C) III 
D) IV 
E) All of the these

Question 9

The following diene does not undergo Diels Alder reaction because _____.

Accepted Answer

A)  it does not have an electron donating group 
B)  it does not have an electron withdrawing group 
C)  the bicyclic ring does not function as a diene 
D)  it cannot adopt the s-cis conformation 
E)  the double bonds are not in the same cyclic ring 
A)  it does not have an electron donating group 
B)  it does not have an electron withdrawing group 
C)  the bicyclic ring does not function as a diene 
D)  it cannot adopt the s-cis conformation 
E)  the double bonds are not in the same cyclic ring

Question 10

What is the IUPAC name for the following compound?

Accepted Answer

1-isopropy

Question 11

Predict the product for the following Claisen rearrangement and provide the curved arrow mechanism for formation of the product.

Accepted Answer

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

Question 12

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 13

Rank the following dienes in order of decreasing heat of hydrogenation (highest to lowest).

Accepted Answer

The answer of Rank the following dienes in order of...

Question 14

Predict the possible products for the following reaction and provide a curved arrow mechanism for the formation of these products.

Accepted Answer

The answer of Predict the possible products for the following...

Question 15

Classify the following compounds as having cumulated, conjugated or isolated double bonds?

Accepted Answer

I. CONJUGATED
II. cu

Question 16

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

Accepted Answer

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

Question 17

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 18

Dienes with  $\pi$ bonds separated by two or more $\sigma$bonds are classified as ______.

Accepted Answer

A)  isolated 
B)  cumulated 
C)  skipped 
D)  conjugated 
E)  none of these 
A)  isolated 
B)  cumulated 
C)  skipped 
D)  conjugated 
E)  none of these

Question 19

Predict the major product for the following Diels-Alder reaction.

Accepted Answer

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

Question 20

Which one of the following represents the HOMO of 1,3,5-hexatriene?

Accepted Answer

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

Exam 17: Conjugated Pi Systems and Pericyclic Reactions

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

Which major product(s) are formed for the following reaction?

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

Use Woodward-Fieser rules to estimate the λ\lambdaλ max for the following compound.

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

Rank the indicted C-C bonds in increasing order of bond length (shortest to longest)

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

Which of the following dienes can undergo the Diels-Alder reaction?

The following diene does not undergo Diels Alder reaction because _____.

What is the IUPAC name for the following compound?

Predict the product for the following Claisen rearrangement and provide the curved arrow mechanism for formation of the product.

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

Rank the following dienes in order of decreasing heat of hydrogenation (highest to lowest).

Predict the possible products for the following reaction and provide a curved arrow mechanism for the formation of these products.

Classify the following compounds as having cumulated, conjugated or isolated double bonds?

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

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

Dienes with π\piπ bonds separated by two or more σ\sigmaσ bonds are classified as ______.

Predict the major product for the following Diels-Alder reaction.

Which one of the following represents the HOMO of 1,3,5-hexatriene?

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

Use Woodward-Fieser rules to estimate the $\lambda$ _max for the following compound. $Use Woodward-Fieser rules to estimate the \lambda <sub>max</sub> for the following compound.$

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

Dienes with $\pi$ bonds separated by two or more $\sigma$ bonds are classified as ______.