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
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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
Why do aldehydes undergo nucleophilic addition reactions while esters undergo nucleophilic acyl substitution reactions?()
A. The carbonyl carbon of an ester is more electrophilic than that of an aldehyde.
B. Aldehydes are more sterically hindered than esters.
C. Once the nucleophile adds to an aldehyde, the tetrahedral intermediate is too sterically hindered to eliminate one of the attached groups.
D. The ester carbonyl carbon is sp3 hybridized while the aldehyde carbonyl carbon is sp2 hybridized.
E. Once the nucleophile adds to an aldehyde, neither H- nor R- can be eliminated because they are poor leaving groups.
Which of the following alcohols can be prepared by the reaction of methyl formate with excess Grignard reagent?()
A. 1-pentanol
B. 2-pentanol
C. 3-pentanol
D. 2-methyl-2-pentanol
E. 3-methyl-3-pentanol
What is the hybridization and geometry of the carbonyl carbon in carboxylic acids and their derivatives?()
A. sp3, tetrahedral
B. sp2, trigonal planar
C. sp2, tetrahedral
D. sp3, trigonal planar
E. sp, trigonal planar
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