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

A new compound, [RbHTNR]_∞ [HTNR^-: C ₆H(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 P2₁/n and the empirical formula C₆H₂N₃O ₈Rb. The unit cell parameters are: a=0.4525 nm, b= 1.0777 nm, c=1.9834 nm, β=90.47(2)°, V= 0.96725 nm³, Z=4, D _c=2.263 g/cm³, M_r=329.58, F(000)=640, μ(Mo Kα)=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°C/min, the thermal decomposition of the complex showed three mass reducing processes between 60 and 500°C, and finally evolved RbCN and some gaseous products.