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The following compound can be produced by the reaction of cyclohexanecarbaldehyde and HC≡C−Na+\mathrm { HC } \equiv \mathrm { C } ^ { - } \mathrm { Na } ^ { + } . The following compound can be produced by the reaction of cyclohexanecarbaldehyde and \mathrm { HC } \equiv \mathrm { C } ^ { - } \mathrm { Na } ^ { + } .

A) True
B) False

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction?

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Of the compounds shown below, the one numbered _____ is an enamine. Of the compounds shown below, the one numbered _____ is an enamine.

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

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Which of the following is a reactive intermediate in the reaction of acetone with bromine in acetic acid to form 1-bromo-2-propanone?


A) carbanion
B) enol
C) enolate
D) radical

E) B) and D)
F) B) 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?

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What is the IUPAC name of the following compound? What is the IUPAC name of the following compound? A) 4,4-diethyl-3-buten-2-one B) 4-ethyl-3-hexen-2-one C) (Z) -4-ethyl-3-hexen-2-one D) 3-ethyl-4-hexen-5-one


A) 4,4-diethyl-3-buten-2-one
B) 4-ethyl-3-hexen-2-one
C) (Z) -4-ethyl-3-hexen-2-one
D) 3-ethyl-4-hexen-5-one

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

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 2-pentanone B) (E) -3-penten-2-ol C) 2-pentanol D) 4-hydroxy-2-pentanone


A) 2-pentanone
B) (E) -3-penten-2-ol
C) 2-pentanol
D) 4-hydroxy-2-pentanone

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

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Which of the following statements is not true?


A) The reaction of a ketone with methanol in the presence of acid to give a acetal proceeds via a resonance stabilized cation
B) Protonation of a ketone increases its electrophilicity
C) The conversion of a hemiacetal to an acetal under acidic conditions proceeds via an SN1 mechanism
D) The conversion of a hemiacetal to an acetal is catalyzed by both acid and base

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

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

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When an acid is added to an enantiomerically pure R-3-phenyl-2-butanone dissolved in ethanol, its optical activity drops to zero. The zero optical activity occurs because of _____.


A) racemization
B) isomerism
C) resonance
D) mesomerism

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

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Which of the following is the best description of the mechanism of the reaction between a ketone and an amine to form an imine?


A) concerted bimolecular substitution
B) nucleophilic addition followed by elimination
C) elimination followed by nucleophilic addition
D) electrophilic addition followed by rearrangement

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

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What is the IUPAC name of the following compound? What is the IUPAC name of the following compound? A) (E) -4-methyl-4-hepten-3-one B) (Z) -4-methyl-4-hepten-3-one C) (E) -4-methyl-3-hepten-5-one D) (Z) -4-methyl-3-hepten-5-one


A) (E) -4-methyl-4-hepten-3-one
B) (Z) -4-methyl-4-hepten-3-one
C) (E) -4-methyl-3-hepten-5-one
D) (Z) -4-methyl-3-hepten-5-one

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

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 2-pentanol B) pentane C) 1-pentene D) (E) 2-pentene


A) 2-pentanol
B) pentane
C) 1-pentene
D) (E) 2-pentene

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

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Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by converting the water to hydroxide ion, a much better nucleophile

A) True
B) False

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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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) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

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What is the advantage of using deuterated solvents in 1H-NMR spectroscopy?

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1H-NMR spectroscopy is used to study the...

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What is the reactivity of Br2 in the acid-catalyzed bromination of acetophenone?


A) acid
B) base
C) nucleophile
D) electrophile

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

Correct Answer

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Showing 21 - 40 of 122

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