Exercises: Diazotization

Instruction : Exercise 1

Fig.1

Instruction : Exercise 2

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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