Synthesis, thermoanalysis, and thermal kinetic thermogravimetric analysis of transition metal Co(II), Ni(II), Cu(II), and Zn(II) complexes with 2-(2-Hydroxyphenyl)benzimidazole (HL)

Four complexes with general formulas (ML2)-L-II center dot CH3OH (M = Co, Zn) and (ML2)-L-II (M = Ni, Cu) were synthesized by transition metal ions M-II (Co, Ni, Cu, Zn) reacting with 2-(2-hydroxyphenyl)-benzimidazole (HL). Their thermal properties were studied; the probable thermal decomposition mechanism for the first step of the Co(II) and Zn(II) complexes was suggested, and the kinetic parameters were also given.