a) write
the
mechanism
for
electrophilic
the
addition of HBr to
to cyclohexane.
Answers
Answer:
This page gives you the facts and a simple, uncluttered mechanism for the electrophilic addition reactions between the hydrogen halides and alkenes like ethene and cyclohexene. Hydrogen halides include hydrogen chloride and hydrogen bromide. If you want the mechanisms explained to you in detail, there is a link at the bottom of the page.
Electrophilic addition reactions involving hydrogen bromide
The facts
Alkenes react with hydrogen bromide in the cold. The double bond breaks and a hydrogen atom ends up attached to one of the carbons and a bromine atom to the other.
In the case of ethene, bromoethane is formed.
Explanation:
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Reactions of Alkenes with Hydrogen Halides
Last updatedJun 6, 2019
Reactions of Alkenes with Bromine
Reactions of Alkenes with Sulfuric Acid
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Contributed by Jim Clark
Former Head of Chemistry and Head of Science at Truro School in Cornwall
This page gives you the facts and a simple, uncluttered mechanism for the electrophilic addition reactions between the hydrogen halides and alkenes like ethene and cyclohexene. Hydrogen halides include hydrogen chloride and hydrogen bromide.
Electrophilic addition reactions involving hydrogen bromide
Alkenes react with hydrogen bromide in the cold. The double bond breaks and a hydrogen atom ends up attached to one of the carbons and a bromine atom to the other. In the case of ethene, bromoethane is formed.
CH2=CH2+HBr→CH3CH2Br(1)
With cyclohexene you get bromocyclohexane.
The structures of the cyclohexene and the bromocyclohexane are often simplified:
Be sure that you understand the relationship between these simplified diagrams and the full structures.
The mechanisms
The reactions are examples of electrophilic addition. With ethene and HBr:
and with cyclohexene:
Electrophilic addition reactions involving the other hydrogen halides
Answer:
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