Studies on Energetic Compounds Part 23: Preparation, Thermal and Explosive Characteristics of Transition Metal Salts of 5-Nitro-2,4-Dihydro-3H-1,2,4-Triazole-3-One (NTO)

摘要

Five transition metal salts of 5-nitro-2,4-dihydro-3H-1,2,4-triazole-3-one, [namely M(NTO)_n centre dot mH_2O where M is Ag, Hg, Cd, Cr, Fe where n=1,2,2,3,3, and m=1,2,2,8,2 repectively] were prepared and characterized (hereafter these compounds will be named as AgNTO, HgNTO, CdNTO, CrNTO and FeNTO, respectively). Their thermal decompositio was investigated by TG, DTA whereas explosive behaviour has been studied in terms of explosion delay, impact and friction sensitivities. Further, kinetic parameters have been derived using non-isothermal TG data and mechanism of thermolysis has also been proposed. It seems that deydration takes place prior to the evolution of NO_2 and the subsequent ring rupture yielding metal oxide. AgNTO on the other hand yields metallic silver. Dehydratio in the case of HgNTO occurs in two steps: at each step one molecule is lost. All the salts are insensitive to impact and at the same time insensitive to friction up to 360 N.