The title complex C36H26MnN4O4 was synthesized and its strucutre was determined by single crystal X-ray diffraction method. The crystal is monoclinic system, space group P21/a, a=0.9833(3), b=1.8646(3), c=0.9449(1)nm, Z=2, final Rw=0.057 for 1217 observed reflections [I≥3σ(I)]. The kinetics of thermal decomposition reaction of the title complex was studied under non-isothermal condition by TG. The kinetic parameters were obtained from the analysis of TG, DTG curves by integral and differential methods. The kinetic first step dα/dt=A.exp(-E/RT).2(1-α)^1^/^2; second step : dα /dt=A.exp(-E/RT).3/2(1-α)[-ln(1-α)]^1^/^3.

Key words: PYRIDINE P, REACTION MECHANISM, REACTION KINETICS, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, THERMOGRAVIMETRY, MANGANESE COMPLEX