Rings, Polymers and Analysis

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  • Created by: Josh
  • Created on: 28-08-12 16:22
Arenes have considerable energetic stability because of the delocalised π bonding electrons.
Arenes require much more vigorous reaction conditions than alkenes to undergo addition reactions because of this extra stability.
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Arene chemistry is dominated by electrophilic substitution reactions that enable arenes to retain their delocalised π electrons.
Hydrogen atoms on the benzene ring may be replaced by a variety of other atoms or groups including halogen atoms and nitro (–NO2) groups.
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The variety of substitution reactions on benzene provides access to many useful compounds.
These include medicines, dyes, explosives and polymers
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Phenols are weakly acidic and form salts.
These are called phenoxides, and also form water on reaction with sodium hydroxide.
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The -OH group enhances the reactivity of the benzene ring towards electrophiles.
Bromine water is decolourised by phenol, producing a white precipitate of 2,4,6-tribromophenol.
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Other cards in this set

Card 2

Front

Hydrogen atoms on the benzene ring may be replaced by a variety of other atoms or groups including halogen atoms and nitro (–NO2) groups.

Back

Arene chemistry is dominated by electrophilic substitution reactions that enable arenes to retain their delocalised π electrons.

Card 3

Front

These include medicines, dyes, explosives and polymers

Back

Preview of the back of card 3

Card 4

Front

These are called phenoxides, and also form water on reaction with sodium hydroxide.

Back

Preview of the back of card 4

Card 5

Front

Bromine water is decolourised by phenol, producing a white precipitate of 2,4,6-tribromophenol.

Back

Preview of the back of card 5

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