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Why can't you use acidic conditions (such as aqueous hydrochloric acid) for the addition of a Grignard reagent to a ketone?


A) Because the Grignard reagent will react with the acid and be quenched
B) Because the ketone will be protonated and thus unreactive
C) Because the ketone will form an unreactive enol
D) Because the Grignard reagent won't dissolve in aqueous solutions

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

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What is the structure of 2-trifluoromethyl-2-methoxybutanal? What is the structure of 2-trifluoromethyl-2-methoxybutanal? A) I B) II C) III D) IV


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

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

Correct Answer

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What is the product? What is the product? A) I B) II C) III D) IV


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

E) None of the above
F) All of the above

Correct Answer

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What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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What sequence of reactions is required for the following transformation? What sequence of reactions is required for the following transformation? A) [1] NaOMe,[2] acetone B) [1] Ph<sub>3</sub>P,[2] acetone C) [1] Ph<sub>3</sub>P,[2] KOtBu,[3] acetone D) Acetone,heat


A) [1] NaOMe,[2] acetone
B) [1] Ph3P,[2] acetone
C) [1] Ph3P,[2] KOtBu,[3] acetone
D) Acetone,heat

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

Correct Answer

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C

Using 1H NMR spectroscopy,how can you tell the difference between an aldehyde and a ketone?


A) An aldehyde has a C-H stretch (one or two) between 2700-2830 cm-1.
B) An aldehyde has a proton signal between 9-10 ppm.
C) A ketone has signals around 2-3 ppm.
D) A ketone has a signal around 200 ppm.

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

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) R-3-hydroxybutanal B) S-3-hydroxybutanal C) R-2-hydroxybutan-4-al D) S-2-hydroxybutan-4-al


A) R-3-hydroxybutanal
B) S-3-hydroxybutanal
C) R-2-hydroxybutan-4-al
D) S-2-hydroxybutan-4-al

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

Correct Answer

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What is the missing reagent in the reaction below? What is the missing reagent in the reaction below? A) Methanol,acid B) Ethanol,acid C) NaOEt D) NaOMe


A) Methanol,acid
B) Ethanol,acid
C) NaOEt
D) NaOMe

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

Correct Answer

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B

What needs to be done to make the following reaction proceed? What needs to be done to make the following reaction proceed? A) Heat the reaction. B) Add an acid catalyst only. C) Add a base catalyst only. D) Heat the reaction and add an acid catalyst.


A) Heat the reaction.
B) Add an acid catalyst only.
C) Add a base catalyst only.
D) Heat the reaction and add an acid catalyst.

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

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What is the major organic product obtained from the following sequence of reactions? What is the major organic product obtained from the following sequence of reactions? A) I B) II C) III D) IV


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

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

Correct Answer

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What is the missing reagent in the reaction below? What is the missing reagent in the reaction below? A) I B) II C) III D) IV


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

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

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) R-4-hydroxy-2-pentanone B) S-4-hydroxy-2-pentanone C) R-2-hydroxy-4-pentanone D) S-2-hydroxy-4-pentanone


A) R-4-hydroxy-2-pentanone
B) S-4-hydroxy-2-pentanone
C) R-2-hydroxy-4-pentanone
D) S-2-hydroxy-4-pentanone

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

Correct Answer

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What is the cyclic hemiacetal product formed from intramolecular cyclization of the following hydroxy aldehyde? What is the cyclic hemiacetal product formed from intramolecular cyclization of the following hydroxy aldehyde? A) I B) II C) III D) IV


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

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

Correct Answer

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What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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Is the following reaction reversible and,if so,under what conditions? Is the following reaction reversible and,if so,under what conditions? A) No B) Yes,under acidic conditions C) Yes,using Pd/C D) Yes,under basic conditions


A) No
B) Yes,under acidic conditions
C) Yes,using Pd/C
D) Yes,under basic conditions

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

Correct Answer

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D

What is the first step in nucleophilic addition under acidic conditions?


A) Protonation of the nucleophile
B) Addition of the nucleophile
C) Loss of water
D) Protonation of the carbonyl

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

Correct Answer

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Why are strongly acidic conditions not used in the formation of enamines and imines?


A) The carbonyl will be protonated.
B) The amine will be completely protonated.
C) The product is not stable to strong acid.
D) An enol will be formed.

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

Correct Answer

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Which of the following oxidants would work for the following reaction? Which of the following oxidants would work for the following reaction? A) H<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> B) FeCl<sub>3</sub> C) I<sub>2</sub> D) Ag<sub>2</sub>O


A) H2Cr2O7
B) FeCl3
C) I2
D) Ag2O

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

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) R-4-bromo-2-pentanone B) S-4-bromo-2-pentanone C) R-2-bromo-4-pentanone D) S-2-bromo-4-pentanone


A) R-4-bromo-2-pentanone
B) S-4-bromo-2-pentanone
C) R-2-bromo-4-pentanone
D) S-2-bromo-4-pentanone

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

Correct Answer

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What is (are) the product(s) of the following reaction? What is (are) the product(s) of the following reaction? A) I only B) II only C) III only D) II and III


A) I only
B) II only
C) III only
D) II and III

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

Correct Answer

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Showing 1 - 20 of 52

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