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Reaction Summary: ALKENES: Reagent Conditions Products Observations Example/Diagram

This document summarizes common reactions of alkenes. It lists various reagents and conditions used to react alkenes, such as bromine, hydrogen halides, acids, and bases. The main products formed from these reactions include vicinal dibromides, bromoalcohols, halogenoalkanes, vicinal diols, carbonyl compounds, alcohols, and alkanes. Observable color changes or temperature conditions are also noted.

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Victoria Kairoo
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119 views1 page

Reaction Summary: ALKENES: Reagent Conditions Products Observations Example/Diagram

This document summarizes common reactions of alkenes. It lists various reagents and conditions used to react alkenes, such as bromine, hydrogen halides, acids, and bases. The main products formed from these reactions include vicinal dibromides, bromoalcohols, halogenoalkanes, vicinal diols, carbonyl compounds, alcohols, and alkanes. Observable color changes or temperature conditions are also noted.

Uploaded by

Victoria Kairoo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Reaction Summary: ALKENES

Reagent Conditions Products Observations Example/Diagram


Br(l)  Room temperature  Vicinal dibromide Bromine decolorized
 No light
Br(aq)  Room temperature  Vicinal dibromide Bromine decolorized
NB: CAPE just uses the dibromide (minor product)
as the product. They disregard the  Bromoalcohol (major
alcohol. product)
Hydrogen halide  Room temperature  Halogenoalkane
HX where X is F, Cl, Br, I  Hydrogen halide either
dissolved in ethanoic
acid or gaseous HX
bubbled through alkene
H+(aq)/KMnO4(aq)  Cold dilute  Vicinal diol Purple colour of KMnO4(aq) decolorized
H+(aq)/KMnO4(aq)
H+(aq)/KMnO4(aq)  Hot concentrated  Mixture of compounds Purple colour of KMnO4(aq) decolorized
H+(aq)/KMnO4(aq) containing a carbonyl
group (C=O) (ketones,
carboxylic acids,
aldehydes which are
oxidized to acids)
 Sometimes CO2 and
H2O formed as well
Hydration  Acidic catalyst  Alkyl hydrogensulfate
(concentrated H2SO4) which is then
hydrolyzed with H2O to
an alcohol and the
sulphuric acid is
regenerated
Hydrogenation  Room temperature  Corresponding alkane
(addition of hydrogen) (150oC) (unsaturated
 High pressure compound)
 Catalyst – nickel or
platinum

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