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Exam 6: Chemical Reactivity and Mechanisms

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Question 31

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What is an intermediate?

A) A local maximum on the energy diagram.
B) A point on the reaction pathway that has a discrete lifetime.
C) A point half-way between the starting materials and products.
D) The highest energy compound on an energy diagram.

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Question 32

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Which of the following cannot be an electrophile?

A)
B)
C)
D)

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Question 33

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What is a transition state?

What pattern of curved arrow pushing is the second step of this reaction?

Given the following rate law, what is the order of the reaction with respect to MeI?

Draw an energy diagram for an endothermic reaction with two steps.

Will the following cation undergo rearrangement?

Predict the sign of $\Delta$ S of the following reaction.

Which of the following is the nucleophilic site in the reactants of the following 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?

Melphalan, a drug used in chemotherapy, reacts with itself before binding with its target in the body, as illustrated below. Draw in the curved arrows that account for this transformation.

For the following reaction step, indicate which pattern of arrow pushing it represents.

For the following reaction step, indicate which pattern of arrow pushing it represents.

Identify the electrophilic site in the following molecule.

Which of the following cations is most likely to undergo rearrangement?

Identify the nucleophilic site in the following molecule.

Which of the following is the electrophilic site in the reactants of the following reaction?

Predict the sign of $\Delta$ G for an exothermic reaction with an increase in entropy.

Identify the electrophilic site in the following molecule.

Draw the mechanism and most likely product for the following cation rearrangement.