题目内容

When the carbonyl group of a neutral ketone is protonated,()

A. the resulting species becomes more electrophilic.
B. the resulting species is activated toward nucleophilic attack.
C. subsequent nucleophilic attack on the resulting species is said to occur under acid-catalyzed conditions.
D. the resulting species has a positive charge.
E. all of the options are correct

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Which of the following reagents can be used to reduce acetic acid to ethyl alcohol?()

A. 1. LiAlH4 2. H3O+
B. 1. NaBH4 2. H3O+
C. H2/Pt
D. NH2NH2, NaOH

What is the major product when (CH3)2CHCH2CH2Br is subjected to the following reaction sequence()Mg, etherCO2 H3O+

A. 3-methyl-1-butanol
B. 2-methyl-2-butanol
C. 4-methyl-1-pentanol
D. 4-methylpentanoic acid

What class of organic compounds results when cyclopentanone reacts with ethylamine in the presence of trace acid?()

A. cyanohydrin
B. semicarbazone
C. imine
D. enamine
E. oxime

Which of the following most typically characterizes the reactions of aldehydes and ketones?()

A. electrophilic addition
B. electrophilic substitution
C. nucleophilic acyl substitution
D. nucleophilic addition
E. radical addition

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