Synthesis,X-ray crystal structure and thermal decomposition mechanism of [RbHTNR]∞

A new compound, [RbHTNR]infinity [HTNR-: C6H(NO2)(3)(OH)O-], was synthesized by the reaction of rubidium nitrate and styphnic acid. The molecular structure was characterized using X-ray diffraction analysis, elemental analysis and FTIR spectroscopy. The crystalline is monoclinic with space group P2(1)/n and the empirical formula C6H2N3O8Rb. The unit cell parameters are: a=0.4525 nm, b=1.0777 nm, c=1.9834 nm, beta=90.47(2)degrees, V= 0.96725 nm(3), Z=4, D-c=2.263 g/cm(3), M-r=329.58, F(000)=640, mu(Mo K alpha)=5.165 mm(-1). The thermal decomposition mechanism of the complex was studied by differential scanning calorimetry (DSC), thermogravimetry-derivative thermogravimetry (TG-DTG) and FTIR techniques. At the linear rate of 10 degrees C/min, the thermal decomposition of the complex showed three mass reducing processes between 60 and 500 degrees C, and finally evolved RbCN and some gaseous products.