The synthesis, crystal structure and thermoanal. of 3-methoxysalicylaldehyde 1,2-diaminobenzene Ni(II) complex (I.H2O) were reported. The complex lies in monoclinic, space group P21/n with a 0.8854(2), b 1.9067(5), c 1.1807(4) nm, b 99.43(2)? Z = 4, final R = 0.044, Rw = 0.052. Kinetic parameters were obtained from anal. of the TG, DTG curves by integral's method and differential's method. The possible reaction mechanism was suggested by comparison of the kinetic parameters. The kinetic equation may be expressed as: da/dt = A譭-E/RT?3/2)?1-a)[-ln(1-a)]1/3. The math. expression of the kinetic compensation effect of the thermal decomposition reaction had been obtained.

Key words: CRYSTAL STRUCTURE DETERMINATION, THERMAL ANALYSIS, REACTION KINETICS, X-RAY DIFFRACTION ANALYSIS, COMPUTER APPLICATIONS, ELECTRON DENSITY, NICKEL COMPLEX, SCHIFF BASE, THERMAL DECOMPOSITION, VANILLIN