Azo Compounds

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  • Created by: J.E.C.
  • Created on: 29-04-14 17:37
Azo compounds contain the __ group?
-N=N-
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ECompounds with arenes either side of this group are more __ than having alkyl groups either side? This is becaus the -N=N- group is...?
Stable. Stabilised by becoming part of an extended delocalised system involving the arene groups.
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These aromatic azo compounds are formed as a result of a __ reaction between a __ salt and a __ agent?
Coupling, diazonium, coupling
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Diazonium salts are unstable because...? For this reason, diazonium salts are prepared in __ soltution and used...?
They tend to lose the -N+=N- group as N2. Ice-cold, immediately.
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Diazonium salts are prepared by adding a cold solution of __ __ to a solution of __ in dilute acid kept below _? This reaction is known as ___?
Sodium Nitrite, arylamine, below 5 degrees celcius. Diazotisation.
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The acid reacts with sodium nitrite to form unstable __ __? This then reacts with the ___?
Nitrous acid. Arylamine.
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In a diazo coupling reaction, a diazonium salt reacts with...?
Another compound containing a benzene ring (coupling agent).
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The diazonium ion acts as a__?
Electrophile - reacts with the benzene ring of the coupling agent.
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When the ice cold solution of the diazonium salt is added to the solution of the coupling agent, a __ __ containg the azo compound forms immediately?
Coloured precipitate
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When a solution of benzendiazonium salt is added to an alkaline solution of phenol, a __ compound is formed?
Yellow-orange
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Diazonium salts also couple with...?
Arylamines.
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Azo compounds are __ and their colour does not __?
Stable, fade.
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Other cards in this set

Card 2

Front

ECompounds with arenes either side of this group are more __ than having alkyl groups either side? This is becaus the -N=N- group is...?

Back

Stable. Stabilised by becoming part of an extended delocalised system involving the arene groups.

Card 3

Front

These aromatic azo compounds are formed as a result of a __ reaction between a __ salt and a __ agent?

Back

Preview of the front of card 3

Card 4

Front

Diazonium salts are unstable because...? For this reason, diazonium salts are prepared in __ soltution and used...?

Back

Preview of the front of card 4

Card 5

Front

Diazonium salts are prepared by adding a cold solution of __ __ to a solution of __ in dilute acid kept below _? This reaction is known as ___?

Back

Preview of the front of card 5
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