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
查看答案
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
Which of the following compounds has the lowest boiling point?()
A. 1-butanol
B. butanoic acid
C. butanenitrile
D. methyl propanoate
E. butanamide
In nucleophilic acyl substitution,()
A. protonation of the carbonyl is followed immediately by loss of the leaving group.
B. loss of the leaving group is followed by rearrangement of the carbocation.
C. addition to the carbonyl by a nucleophile is followed by loss of the leaving group.
D. ester hydrolysis is followed by deprotonation.
E. an SN2 reaction occurs.
Acetyl chloride undergoes nucleophilic substitution at a faster rate than methyl acetate because ________.()
A. the ester is more sterically hindered than the acid chloride
B. the acid chloride is more sterically hindered than the ester
C. the methoxide is a better leaving group than chloride
D. esters hydrolyze faster than acid chlorides
E. chloride is a better leaving group than methoxide
微信支付 
支付宝支付