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What pattern of curved arrow pushing is the second step of this reaction? What pattern of curved arrow pushing is the second step of this reaction? A) proton transfer B) loss of leaving group C) nucleophilic attack D) rearrangement


A) proton transfer
B) loss of leaving group
C) nucleophilic attack
D) rearrangement

E) A) and D)
F) C) and D)

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Draw the most likely structure of the following cation after it has rearranged. Draw the most likely structure of the following cation after it has rearranged.

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Which of the following is hydride?


A) H+
B) H
C) H−
D) H2

E) C) and D)
F) A) and B)

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Does a reaction with a positive ∆S and a negative ∆H favor reactants or products?

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What pattern of curved arrow pushing is the second step of this reaction? What pattern of curved arrow pushing is the second step of this reaction? A) proton transfer B) loss of leaving group C) nucleophilic attack D) rearrangement


A) proton transfer
B) loss of leaving group
C) nucleophilic attack
D) rearrangement

E) B) and D)
F) None of the above

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Identify the nucleophilic atom in the following molecule, Me3P.


A) P
B) C
C) H
D) Me

E) B) and C)
F) A) and D)

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Melphalan, a drug used in chemotherapy, reacts with itself in the body before binding with its target, as illustrated in the mechanism below. Which two patterns of arrow pushing are seen in this reaction? Melphalan, a drug used in chemotherapy, reacts with itself in the body before binding with its target, as illustrated in the mechanism below. Which two patterns of arrow pushing are seen in this reaction?

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Nucleophil...

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Will the following cation undergo rearrangement? SHAPE \* MERGEFORMAT Will the following cation undergo rearrangement? SHAPE \* MERGEFORMAT Will the following cation undergo rearrangement? SHAPE \* MERGEFORMAT

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In a heterolytic bond cleavage, ____ are formed.


A) ions
B) radicals
C) only cations
D) only anions

E) A) and D)
F) All of the above

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Identify the sequence of curved arrows (electron movement) in the steps of the following reaction. Identify the sequence of curved arrows (electron movement) in the steps of the following reaction. A) proton transfer, proton transfer B) proton transfer, loss of leaving group C) nucleophilic attack, proton transfer D) proton transfer, nucleophilic attack


A) proton transfer, proton transfer
B) proton transfer, loss of leaving group
C) nucleophilic attack, proton transfer
D) proton transfer, nucleophilic attack

E) B) and C)
F) A) and D)

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Which of the following would you expect to have the most negative ∆S?


A) Which of the following would you expect to have the most negative ∆S? A) B) C) D)
B) Which of the following would you expect to have the most negative ∆S? A) B) C) D)
C) Which of the following would you expect to have the most negative ∆S? A) B) C) D)
D) Which of the following would you expect to have the most negative ∆S? A) B) C) D)

E) C) and D)
F) None of the above

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Which of the following describes the effect of a catalyst on a reaction?


A) It lowers the free energy of the products.
B) It makes the reactants less stable.
C) It changes the equilibrium constant.
D) It lowers the energy of activation.

E) A) and B)
F) All of the above

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Draw curved arrows for each step of the following reaction. Draw curved arrows for each step of the following reaction.

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blured image_TB4454_00 6.10 Desc...

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Which of the following mechanistic steps represents a nucleophilic attack? Which of the following mechanistic steps represents a nucleophilic attack? A) I B) II C) III D) IV


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

E) A) and B)
F) B) and D)

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Which of the following energy diagrams is of a reaction with one transition state?


A) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
B) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
C) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
D) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)

E) B) and D)
F) A) and B)

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Identify the electrophilic site in the following molecule, CH3CH2NHCH2CH3.


A) H
B) N
C) CH2
D) CH3
E) there is no electrophilic site

F) A) and C)
G) A) and E)

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Identify the nucleophilic and electrophilic sites in the substrate and reagent of the following reaction. Identify the nucleophilic and electrophilic sites in the substrate and reagent of the following reaction.

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blured image_TB4454_00 6.10 Desc...

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Identify the electrophilic site in the following molecule. Identify the electrophilic site in the following molecule.

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SHAPE \* M...

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Which of the following energy diagrams is of a reaction with one intermediate?


A) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
B) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
C) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
D) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)

E) A) and C)
F) C) and D)

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Using Table 6.1, which of the following is the enthalpy change of the following reaction under standard conditions? Using Table 6.1, which of the following is the enthalpy change of the following reaction under standard conditions? A) -8 kJ/mol B) +8 kJ/mol C) -506 kJ/mol D) +63 kJ/mol


A) -8 kJ/mol
B) +8 kJ/mol
C) -506 kJ/mol
D) +63 kJ/mol

E) B) and C)
F) B) and D)

Correct Answer

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