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Chapter 9: Substitution and Elimination Reactions of Alkyl Halides
Exercises
Practice Exercise 4
Practice Exercise 4
This activity contains 7 questions.
Which of the following alkyl halides will be the most reactive in an E2 reaction?
1-bromo-2,2-dimethylpentane
2-bromo-3-methylpentane
3-bromo-3-methylpentane
1-bromo-2-methylpentane
1-bromo-4-methylpentane
What alkyl halide and what alcohol should be used to synthesize benzyl phenyl ether (C
6
H
5
-CH
2
-O-C
6
H
5
)?
bromobenzene and phenol
benzyl alcohol and bromobenzene
benzyl bromide and phenol
benzyl alcohol and benzyl chloride
benzyl alcohol and phenol
What products would be obtained when trans-1-chloro-2-methylcyclohexane undergoes an E1 reaction, and when it undergoes an E2 reaction?
Both E1 and E2 reactions will form 1-methylcyclohexene.
Both E1 and E2 reactions will form 3-methylcyclohexene.
An E1 reaction will form 3-methylcyclohexene, and an E2 reaction will form 1-methylcyclohexene.
An E1 reaction will form 1-methylcyclohexene, and an E2 reaction will form 3-methylcyclohexene.
An E1 reaction will form 1-methylcyclohexene, and an E2 reaction will not occur.
Which of the following statements is
not
correct?
A primary alkyl halide will not undergo an E1 reaction.
An E2 reaction is a concerted reaction.
A tertiary alkyl halide can undergo both E1 and E2 reactions.
An E1 reaction is favored by a strong base.
Secondary alkyl halides are more reactive than primary alkyl halides in E2 reactions.
An elimination reaction is classified as an alpha-, beta-, or gamma depending on the relative positions of the two fragments that are being eliminated. What is a beta-elimination?
a 1,1-elimination
a 1,2-elimination
a 1,3-elimination
a 1,4-elimination
a 1,5-elimination
Which of the following alkyl halides would be the most reactive in an E2 reaction?
1-bromo-1,2-dimethylpentane
3-bromo-3-methylpentane
3-bromo-2,4-dimethylpentane
3-bromo-2,3-dimethylpentane
3-bromo-2-methylpentane
Which of the following alkyl halides would be the least reactive in an E2 reaction?
CH
3
CH
2
Br
CH
3
CHBr-CH
2
CH
3
CH
3
CH
2
CH
2
CH
2
Br
CH
3
-C(CH
3
)Br-CH(CH
3
)-CH
3
CH
3
-C(CH
3
)Br-CH
2
-CH
3
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