A new method for the synthesis of triaminoguanidine salt of 3-nitro-1,2,4-triazol-5-one

摘要

Many derivatives of 3-nitro-1,2,4-triazol-5-one (NTO) are described in last years, especially salts and complexes. Triaminoguanidine salt of 3-nitro-1,2,4-triazol-5-one (TAGNTO) is an important and prospective compound due to their high nitrogen content and reduced sensitivity for mechanical and shock initiation. We present the results of study on development of new method for synthesis of TAGNTO starting from NTO sodium salt and triaminoguanidine hydrochloride. Reactions were carried out in methanol in ambient and elevated temperatures. Solid products were collected by simple filtration, dried and weighed. The products were analyzed by using multinuclear NMR spectroscopy and DTA/TG techniques. Crystals shape were evaluated with images from optical microscope. It has been found that the optimal solvent for synthesis is methanol due to the solubility of by-product sodium chloride. TAGNTO forms stable hydrate which after dehydratation decomposes exothermically without melting at 203 °C.