Metazonic acid

When the nitrile-oxide is treated with 5 % aqueous NaOH at 0° C, three products can be isolated the two isomers XXXIV and XXXV and the metazonic acid XXXVI the latter, on heating in boiling xylene is transformed into XXXIV (66, 68, 78). 

It is produced by the action of sodium hydroxide on nitromethane at an elevated temperature (Friese [72] Steinkopf and Kirchhoff [73]). Urbanski and Kowalczyk [74] found that some heavy metal salts of this compound have weak initiating properties and that metazonic acid itself is a fairly weak explosive. Its expansion in the lead block is 240 cm3. 

A convenient preparative method for the synthesis of 2-substituted 4-nitro-l,2,3-triazoles is based on the condensation of diazonium salts with metazonic acid. The latter is in turn synthesized by the action of alkali on nitromethane [423,508-510] (Scheme 78). 

Other slyphnates Lead dinitroresorcinale Nitrosophcnol salts Nitraminc salts Salts of metazonic acid Salts of oxalic acid Peroxides... 

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