Preparation, crystal structure and thermal decomposition mechanism of [K(HTNR)(H2O)]n

The new coordination polymer of potassium 2; 4, 6-trinitroresorcinate, [K(HTNR) (H2O)](n), was prepared by reacting 2, 4, 6-trinitroresorcinol with potassium hydroxide in alcohol solution. Its crystal structure was determined by X-ray single crystal diffraction analysis. The crystalline belongs to monoclinic with space group P2(1)/c. Its unit cell parameters are as follows: a = 0.7888(1) nm, b = 1.3800(2) nm, c = 0.9520(1) nm, beta = 8.91(1)degrees, V = 1.0238 (2) nm(3), D-c = 1.954 g/cm(3), Z = 4, F (000) = 608, mu ( Mo Ka) = 0.575 mm(-1). The thermal decomposition mechanism of the. complex was studied by using differential scanning calorimetry (DSC), thermogravimetry-derivative thermogravimetry (TG-DTG) and FT-IR techniques. At the linear heated rate the thermal decomposition of the complex contained two overlapped weak endothermic and two. intense exothermic processes. There are KNCO and RCOOK at 271. 9 degreesC, and KNC at 357.1 degreesC in the residue according to FT-IR analysis.