Synthesis, crystal structure, thermal decomposition, and non-isothermal reaction kinetic analysis of an energetic complex: [Mg(CHZ)3](ClO4)2 (CHZ = carbohydrazide)

An energetic complex [Mg(CHZ)(3)](ClO4)(2) was synthesized by the reaction of carbohydrazide (CHZ) with magnesium perchlorate. The product was characterized by X-ray single-crystal diffraction, elemental analysis, and IR spectroscopy. The crystal belongs to the monoclinic system with space group P2(1)/n. Cell parameters: a = 10.034(2) angstrom, b = 8.5069(16) angstrom, c = 21.285(4) angstrom, beta = 100.901(3)degrees, V = 1784.1(6) angstrom(3), Z = 4. The central magnesium is sixcoordinate with three oxygen atoms of carbonyl groups and three terminal nitrogen atoms of the hydrazine groups from three CHZs to form a distorted octahedron. Differential scanning calorimetry and thermogravimetric-differential thermogravimetric analysis were applied to assess the thermal decomposition behavior. The kinetic parameters were obtained by non-isothermal reaction kinetics. The equation can be expressed as d alpha/dT = 4 x 10(6.13)alpha(3/4)e(8.51x103/T). Moreover, the values of critical temperature of thermal explosion, Delta S-not equal, Delta H-not equal, Delta G(not equal), and the energy of combustion were obtained as 284 degrees C, -169.76 J mol(-1) K-1, 65.46 kJ mol(-1), 154.27 kJ mol(-1), and 6759 kJkg(-1), respectively.