Azo Compounds 0.0 / 5 ? ChemistryColour by DesignA2/A-levelOther Created by: J.E.C.Created on: 29-04-14 17:37 Azo compounds contain the __ group? -N=N- 1 of 12 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. 2 of 12 These aromatic azo compounds are formed as a result of a __ reaction between a __ salt and a __ agent? Coupling, diazonium, coupling 3 of 12 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. 4 of 12 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. 5 of 12 The acid reacts with sodium nitrite to form unstable __ __? This then reacts with the ___? Nitrous acid. Arylamine. 6 of 12 In a diazo coupling reaction, a diazonium salt reacts with...? Another compound containing a benzene ring (coupling agent). 7 of 12 The diazonium ion acts as a__? Electrophile - reacts with the benzene ring of the coupling agent. 8 of 12 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 9 of 12 When a solution of benzendiazonium salt is added to an alkaline solution of phenol, a __ compound is formed? Yellow-orange 10 of 12 Diazonium salts also couple with...? Arylamines. 11 of 12 Azo compounds are __ and their colour does not __? Stable, fade. 12 of 12
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