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Chapter 5: The Reactions of Alkenes and Alkynes: An Introduction to Multi-step Synthesis
Exercises
Practice Exercise 1
Practice Exercise 1
This activity contains 7 questions.
Which of the following could
not
be made by an electrophilic addition to a cyclohexene?
cyclohexanol
cyclohexylbromide
cyclohexyl amine
1,2-dibromocyclohexane
cyclohexane
Which of the following carbocations is the most stable?
CH
3
-CH
2
-CH
2
-C(+)H
2
(CH
3
)
2
C(+)H
(CH
3
)
3
C(+)
CH
3
C(+)H
2
H
3
C(+)
Which of the following reactions is regioselective?
the reaction of 2-pentene with HBr
the reaction of 2,3-dimethyl-2-butene with HBr
the reaction of 1-pentene with HBr
the reaction of 2-hexene with HBr
the reaction of 1,2-dimethylcyclohexene with HBr
What is the nucleophile in the hydration of alkenes?
hydronium
water
hydroxide
bromide
methanol
Which of the following alkenes would undergo electrophilic addition of HBr with the highest regioselectivity?
3-heptene
1-hexene
2-hexene
2-methyl-2-butene
1-methylcyclohexene
What product is formed from the reaction of methanol and propene, CH
3
-CH=CH
2
, in the presence of a trace amount of sulfuric acid?
CH
3
-CH
2
-CH
2
-CH
2
-OH
CH
3
-CH
2
-CH
2
-O-CH
3
(CH
3
)
2
CH(OCH
3
)
CH
3
-CH
2
-O-CH
2
-CH
3
HO-C(CH
3
)
3
Which of the following best describes the reaction coordinate for the addition of water to an alkene?
3 intermediates with 4 transition states
2 intermediates with 2 transition states
2 intermediates with 3 transition states
1 step with no transition states
1 intermediate and 2 transition states
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