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Reactions of Aromatic Compounds (overall)

Exercises: Diazotization

Instruction : Exercise 1

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Fig.1

Instruction : Exercise 2

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Fig.2

Exercise

In contrast to aliphatic diazonium cations, which usually spontaneously decompose through splitting off nitrogen, aromatic diazonium salts are usually ...

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... instable just below 5 °C.

... stable at every temperature.

... relatively stable below 5 °C.

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Exercise

The cause of the higher stability of aromatic diazonium salts compared to aliphatic diazonium salts is ...

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... the delocalization and, thus, stabilization of the positive charge by the aromatic system.

... the delocalization and, thus, destabilization of the negative charge by the aromatic system.

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Exercise

Protonation of an aromatic diazohydroxide's hydroxy group and subsequent elimination of water yield ...

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... a Sandmeyer ion.

... an aromatic diazonium ion.

... an aromatic azo ion.

... an aromatic diazonium electron.

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Exercise

Aromatic diazonium ions are relatively stable only in acidic and poorly basic solution. Under moderately and strong basic conditions, they are transformed into diazohydroxides and, finally, ...

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... into diazotate zwitterions.

... into diazotate electrons.

... into diazotate cations.

... into diazotate anions.

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Exercise

Aromatic diazonium salts may also be isolated. However, ...

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... in a dried state, they are explosive.

... in a liquid state, they are explosive.

... in a frozen state, they are explosive.

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Exercise

Aromatic diazonium salts are starting products of ...

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... Allan-Robinson reaction.

... Reformatsky reaction.

... McMurry reaction.

... Sandmeyer reaction.

... Kuhn-Winterstein reaction.

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