Question 1

Consider the following reaction.   This is an example of a sigmatropic reaction with a [3,3]-shift.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following laws relates absorbance to the concentration of a sample and the pathlength in ultraviolet-visible spectroscopy?

Accepted Answer

A)  Buzz-Beer law 
B)  Beer-Lambert law 
C)  Duff-Beer law 
D)  Christopher-Lambert law 
A)  Buzz-Beer law 
B)  Beer-Lambert law 
C)  Duff-Beer law 
D)  Christopher-Lambert law

Question 3

What is the IUPAC name of the following compound?

Accepted Answer

(E)-2,3-di

Question 4

Which of the following arrangements of p atomic orbitals gives the lowest energy π-bonding molecular orbital of 1,3-butadiene?

Accepted Answer

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

Question 5

A reaction in which two reactants add together in a single step to form a cyclic product is known as a _____.
​
​

Accepted Answer

cycloaddit

Question 6

The following spectrum could arise from π to π* transitions.

Accepted Answer

A) True 
 B)False

Question 7

What is (are) the major organic product(s) formed in the following reaction?

Accepted Answer

A)  only 1 
B)  only 1 and 2 
C)  only 1 and 3 
D)  only 2 and 4 
A)  only 1 
B)  only 1 and 2 
C)  only 1 and 3 
D)  only 2 and 4

Question 8

Consider the reaction below to answer the following question(s):   Enter the appropriate letter in the blank for each the following statements.
-The product that results from 1,4-addition is _____.

Accepted Answer

The answer of Consider the reaction below to answer the...

Question 9

Consider the reaction below to answer the following question(s):   Enter the appropriate letter in the blank for each the following statements.
-The kinetically controlled product in this reaction is _____.

Accepted Answer

The answer of Consider the reaction below to answer the...

Question 10

Based on the following table.
$\begin{array} { | c | c | } 
\hline \text { Compound } & \lambda _ { \max } ( \mathbf { n m } ) \
\hline \mathrm { W } & 190 \
\hline \mathrm { X } & 340 \
\hline \mathrm { Y } & 560 \
\hline \mathrm { Z } & 250 \
\hline
\end{array}$
Compound ______ has the largest energy difference between the HOMO and LUMO.

Accepted Answer

The answer of Based on the following table.
\(\begin{array} { |...

Question 11

Which of the following are conjugated dienes?

Accepted Answer

A)  only 1 
B)  only 2 
C)  only 1 and 2 
D)  1, 2 and 3 
A)  only 1 
B)  only 2 
C)  only 1 and 2 
D)  1, 2 and 3

Question 12

What is the IUPAC name of the following compound?

Accepted Answer

(E)-2,3-di

Question 13

Consider the reaction below to answer the following question(s).   Fill in the blank in the question with the appropriate letter.
-The dienophile in the reaction is ____.

Accepted Answer

The answer of Consider the reaction below to answer the...

Question 14

For Diels-Alder cycloaddition reactions to take place most rapidly and in highest yield a dienophile must be substituted with electron-donating groups.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is(are) formed upon addition of 1 mol of Br2 to 1,3-cyclohexane?

Accepted Answer

A)  only 2 
B)  only 1 and 3 
C)  only 2 and 4 
D)  1, 2 and 3 
A)  only 2 
B)  only 1 and 3 
C)  only 2 and 4 
D)  1, 2 and 3

Question 16

Pericyclic reactions occur in a single step with the _____.

Accepted Answer

A)  formation of a radical 
B)  formation of an ionic intermediate 
C)  formation of a molecular ion 
D)  formation of a transition state 
A)  formation of a radical 
B)  formation of an ionic intermediate 
C)  formation of a molecular ion 
D)  formation of a transition state

Question 17

Consider the reaction below to answer the following question(s).   Fill in the blank in the question with the appropriate letter.
-This is an example of a(n) ____________ reaction.
A. sigmatropic reaction
B. electrophillic addition
C. Diels-Alder reaction
D. Cope rearrangement

Accepted Answer

The answer of Consider the reaction below to answer the...

Question 18

Which of the following electronic transitions is apparent in the ultraviolet-visible spectrum of 1,3-butadiene?

Accepted Answer

A)  n → π* 
B)  π → π * 
C)  σ → π * 
D)  σ → π 
A)  n → π* 
B)  π → π * 
C)  σ → π * 
D)  σ → π

Question 19

How would you be able to distinguish between 1,3-cyclohexadiene and 1,4-cyclohexadiene using ultraviolet spectroscopy?

Accepted Answer

1,3-Cyclohexadiene, in which t

Question 20

The following compound could act as a diene in a Diels-Alder reaction.

Accepted Answer

A) True 
 B)False

Exam 20: Dienes, Conjugated Systems, and Pericyclic Reactions

Consider the following reaction. This is an example of a sigmatropic reaction with a [3,3]-shift.

Which of the following laws relates absorbance to the concentration of a sample and the pathlength in ultraviolet-visible spectroscopy?

What is the IUPAC name of the following compound?

Which of the following arrangements of p atomic orbitals gives the lowest energy π-bonding molecular orbital of 1,3-butadiene?

A reaction in which two reactants add together in a single step to form a cyclic product is known as a _____. ​ ​

The following spectrum could arise from π to π* transitions.

What is (are) the major organic product(s) formed in the following reaction?

Consider the reaction below to answer the following question(s): Enter the appropriate letter in the blank for each the following statements. -The product that results from 1,4-addition is _____.

Consider the reaction below to answer the following question(s): Enter the appropriate letter in the blank for each the following statements. -The kinetically controlled product in this reaction is _____.

Based on the following table. Compound () 190 340 560 250 Compound ______ has the largest energy difference between the HOMO and LUMO.

Which of the following are conjugated dienes?

What is the IUPAC name of the following compound?

Consider the reaction below to answer the following question(s). Fill in the blank in the question with the appropriate letter. -The dienophile in the reaction is ____.

For Diels-Alder cycloaddition reactions to take place most rapidly and in highest yield a dienophile must be substituted with electron-donating groups.

Which of the following is(are) formed upon addition of 1 mol of Br2 to 1,3-cyclohexane?

Pericyclic reactions occur in a single step with the _____.

Consider the reaction below to answer the following question(s). Fill in the blank in the question with the appropriate letter. -This is an example of a(n) ____________ reaction. A. sigmatropic reaction B. electrophillic addition C. Diels-Alder reaction D. Cope rearrangement

Which of the following electronic transitions is apparent in the ultraviolet-visible spectrum of 1,3-butadiene?

How would you be able to distinguish between 1,3-cyclohexadiene and 1,4-cyclohexadiene using ultraviolet spectroscopy?

The following compound could act as a diene in a Diels-Alder reaction.

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

A reaction in which two reactants add together in a single step to form a cyclic product is known as a _____.

Which of the following is(are) formed upon addition of 1 mol of Br₂ to 1,3-cyclohexane?