Transition Metal Complexes with Pyrazole-Based Ligands 7. Zn(II), Co(II), Mn(II) and Cu(II) complexes with 3-amino-5-methylpyrazole

Complexes represented by the general formula [MCl 2 L 2 ] (M(II)=Zn, Mn, Co) and complexes of [Cu 3 Cl 6 L 4 ] and CuSO 4 L 2 ·4H 2 O, CoSO 4 L 2 ·3H 2 O, [ZnSO 4 L 3 ] where L stands for 3-amino-5-methylpyrazole were prepared. The complexes were characterized by elemental analysis, FT-IR spectroscopy, thermal (TG, DTG, DSC and EGA) methods and molar conductivity measurements. Except for the Zn-complexes, the magnetic susceptibilities were also determined. Thermal decomposition of the sulphato complexes of copper(II) and cobalt(II) and the chloro complexes of cobalt(II) and manganese(II) resulted in well-defined intermediates. On the basis of the IR spectra and elemental analysis data of the intermediates a decomposition scheme is proposed.