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Does a reaction with a positive Δ\Delta G 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

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The following reaction has three mechanistic steps. Identify the pattern of arrow pushing steps in each step. The following reaction has three mechanistic steps. Identify the pattern of arrow pushing steps in each step.

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Proton transfer; los...

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Identify the nucleophilic atom in the following molecule. Identify the nucleophilic atom in the following molecule. A) P B) C C) H D) Me


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

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Which of the following is the enthalpy change of the following reaction under standard conditions? Which of the following is the enthalpy change of the following reaction under standard conditions? A) -8 kJ/mol B) +8 kJ/mol C) +222 kJ/mol D) +79 kJ/mol


A) -8 kJ/mol
B) +8 kJ/mol
C) +222 kJ/mol
D) +79 kJ/mol

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Predict the sign of Δ\Delta S of the following reaction. Predict the sign of \Delta S of the following reaction. A) positive B) negative C) no change


A) positive
B) negative
C) no change

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Which of the following mechanistic steps represents the loss of a leaving group?


A) Which of the following mechanistic steps represents the loss of a leaving group? A) B) C) D)
B) Which of the following mechanistic steps represents the loss of a leaving group? A) B) C) D)
C) Which of the following mechanistic steps represents the loss of a leaving group? A) B) C) D)
D) Which of the following mechanistic steps represents the loss of a leaving group? A) B) C) D)

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Identify the nucleophilic site(s) in the following molecule. Identify the nucleophilic site(s) in the following molecule.

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Does a reaction with a Δ\Delta H of 20 kJ/mol and a Δ\Delta S of 10 J/mol K at 298 K favor reactants or products?

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Predict the sign of Δ\Delta G for an endothermic reaction with a decrease in entropy.


A) positive
B) negative
C) no change
D) cannot predict without additional information

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

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What type of bond cleavage does the following reaction involve? What type of bond cleavage does the following reaction involve? A) homolytic B) heterolytic


A) homolytic
B) heterolytic

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Which of the following is an energy diagram for a two-step reaction?


A) Which of the following is an energy diagram for a two-step reaction? A) B) C) D)
B) Which of the following is an energy diagram for a two-step reaction? A) B) C) D)
C) Which of the following is an energy diagram for a two-step reaction? A) B) C) D)
D) Which of the following is an energy diagram for a two-step reaction? A) B) C) D)

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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

Correct Answer

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

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Estimate the enthalpy change of the following reaction under standard conditions. Estimate the enthalpy change of the following reaction under standard conditions.

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Which of the following is the most likely structure of the following cation after rearrangement? Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)


A) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
B) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
C) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
D) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)

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Will the following cation undergo rearrangement? Will the following cation undergo rearrangement?

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Later in the course, we will compare the halogenation of differently substituted carbons, comparing reactions like the ones below. Which of the following statements is true about reactions A and B? Later in the course, we will compare the halogenation of differently substituted carbons, comparing reactions like the ones below. Which of the following statements is true about reactions A and B? A) Both reactions have a positive heat of reaction ( \Delta H<sup>o</sup>) B) Neither reaction has a positive heat of reaction ( \Delta H<sup>o</sup>) C) Only reaction A has a positive heat of reaction ( \Delta H<sup>o</sup>) D) Only reaction B has a positive heat of reaction ( \Delta H<sup>o</sup>)


A) Both reactions have a positive heat of reaction ( Δ\Delta Ho)
B) Neither reaction has a positive heat of reaction ( Δ\Delta Ho)
C) Only reaction A has a positive heat of reaction ( Δ\Delta Ho)
D) Only reaction B has a positive heat of reaction ( Δ\Delta Ho)

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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

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Showing 21 - 40 of 110

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