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N,N-Bis(3-nitro-benzyl-idene)pyridine-2,6-dicarbohydrazide dimethyl-formamide disolvate trihydrate

Cuixia Cheng1, Haowen Liu

  • 1Key Laboratory of Catalysis and Materials Science of Hubei Provence, College of Chemistry and Materials Science, South Central University of Nationalities, Wuhan 430074, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
PubMed

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Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
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Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
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The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.