Question 1

Draw the major organic product of the following reaction.

Accepted Answer

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

Question 2

Which of the following is the product of the reaction conditions shown?

Accepted Answer

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

Question 3

Which of these structures shows the preferred conformation for an E2 reaction to occur?

Accepted Answer

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

Question 4

Which of the following statements is true about the two processes shown here?

Accepted Answer

A) A forms faster than B because A is more stable. 
B) B forms faster than A because B is more stable. 
C) A forms faster than B because the transition state leading to A is lower in energy than the transition state leading to B. 
D) B forms faster than A because the transition state leading to B is lower in energy than the transition state leading to A. 
E) A and B form at the same rate. 
A) A forms faster than B because A is more stable. 
B) B forms faster than A because B is more stable. 
C) A forms faster than B because the transition state leading to A is lower in energy than the transition state leading to B. 
D) B forms faster than A because the transition state leading to B is lower in energy than the transition state leading to A. 
E) A and B form at the same rate.

Question 5

Which of the following carbocations is (are) most likely to rearrange?

Accepted Answer

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

Question 6

Which of the following reactions would give relatively more E2 than SN2 product?
Reaction A:
 
Reaction B:

Accepted Answer

The answer of Which of the following reactions would give...

Question 7

Explain why Reaction A would give more E2 product than Reaction B, while Reaction B would give more SN2 product than Reaction A.
Reaction A:
 
Reaction B:

Accepted Answer

S_N2 reactions have much more c

Question 8

Propose a mechanism to account for the formation of the observed product.

Accepted Answer

The answer of Propose a mechanism to account for the...

Question 9

Which of these is the most stable carbanion?

Accepted Answer

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

Question 10

Draw all the possible addition products formed in the reaction shown.

Accepted Answer

The answer of Draw all the possible addition products formed...

Question 11

Draw the product of the following E2 reaction. Show stereochemistry at all stereogenic carbons.

Accepted Answer

The answer of Draw the product of the following E2...

Question 12

Draw the product of the following E2 reaction and provide a mechanism for its formation.

Accepted Answer

The answer of Draw the product of the following E2...

Question 13

Draw a mechanism to rationalize the formation of the alkene product shown in the following
transformation.

Accepted Answer

The answer of Draw a mechanism to rationalize the formation...

Question 14

Which of the following carbocations is least likely to rearrange?

Accepted Answer

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

Question 15

What is the major product of this reaction?

Accepted Answer

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

Question 16

What will happen to the rate of the reaction below if the concentration of ethanol is doubled?

Accepted Answer

A)  The rate will double. 
B)  The rate will be cut in half. 
C)  The rate will be unaffected. 
D)  The rate will increase by a factor of four. 
E)  The rate will decrease by a factor of four. 
A)  The rate will double. 
B)  The rate will be cut in half. 
C)  The rate will be unaffected. 
D)  The rate will increase by a factor of four. 
E)  The rate will decrease by a factor of four.

Question 17

In which of these reactions do you expect the structure of the transition state to most closely resemble the structure of the product?

Accepted Answer

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

Question 18

Draw a mechanism to rationalize the formation of the alkene product shown in the following
transformation.

Accepted Answer

The answer of Draw a mechanism to rationalize the formation...

Question 19

Which of the following structures is not a possible product of the reaction shown here?

Accepted Answer

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

Question 20

Which of the following statements is true?

Accepted Answer

A) The formation of the kinetic product has a higher activation energy than the formation of the thermodynamic product. 
B) The kinetic product is more stable than the thermodynamic product. 
C) The thermodynamic product forms faster than the kinetic product. 
D) The transition state leading to the kinetic product is lower in energy than those leading to alternative products. 
E) The kinetic and thermodynamic products form at the same rate; it is the energy difference between them that determines product distribution. 
A) The formation of the kinetic product has a higher activation energy than the formation of the thermodynamic product. 
B) The kinetic product is more stable than the thermodynamic product. 
C) The thermodynamic product forms faster than the kinetic product. 
D) The transition state leading to the kinetic product is lower in energy than those leading to alternative products. 
E) The kinetic and thermodynamic products form at the same rate; it is the energy difference between them that determines product distribution.

Exam 8: Elimination Reactions: the E1 and E2 Reactions

Draw the major organic product of the following reaction.

Which of the following is the product of the reaction conditions shown?

Which of these structures shows the preferred conformation for an E2 reaction to occur?

Which of the following statements is true about the two processes shown here?

Which of the following carbocations is (are) most likely to rearrange?

Which of the following reactions would give relatively more E2 than SN2 product? Reaction A: Reaction B:

Explain why Reaction A would give more E2 product than Reaction B, while Reaction B would give more SN2 product than Reaction A. Reaction A: Reaction B:

Propose a mechanism to account for the formation of the observed product.

Which of these is the most stable carbanion?

Draw all the possible addition products formed in the reaction shown.

Draw the product of the following E2 reaction. Show stereochemistry at all stereogenic carbons.

Draw the product of the following E2 reaction and provide a mechanism for its formation.

Draw a mechanism to rationalize the formation of the alkene product shown in the following transformation.

Which of the following carbocations is least likely to rearrange?

What is the major product of this reaction?

What will happen to the rate of the reaction below if the concentration of ethanol is doubled?

In which of these reactions do you expect the structure of the transition state to most closely resemble the structure of the product?

Draw a mechanism to rationalize the formation of the alkene product shown in the following transformation.

Which of the following structures is not a possible product of the reaction shown here?

Which of the following statements is true?

Atoms and Molecules; Orbitals and Bonding

Alkanes

Alkenes and Alkynes

Stereochemistry

Rings

Substituted Alkanes: Alkyl Halides, Alcohols, Amines, Ethers,thiols, and Thioethers

Substitution Reactions: the Sn2 and Sn1 Reactions

Analytical Chemistry: Spectroscopy

Electrophilic Additions to Alkenes

More Additions to Bonds

Radical Reactions

Dienes and the Allyl System: 2p Orbitals in Conjugation

Aromaticity

Substitution Reactions of Aromatic Compounds

Carbonyl Chemistry 1: Addition Reactions

Carboxylic Acids

Derivatives of Carboxylic Acids: Acyl Compounds

Carbonyl Chemistry 2: Reactions at the Α Position

Special Topic: Carbohydrates

Special Topic: Bio-Organic Chemistry

Special Topic: Amino Acids and Polyamino Acids Peptides and Proteins

Special Topic: Reactions Controlled by Orbital Symmetry

Special Topic: Intramolecular Reactions and Neighboring Group Participation

Filters

Explain why Reaction A would give more E2 product than Reaction B, while Reaction B would give more S_N2 product than Reaction A. Reaction A: Reaction B: