Transition metal complexes of the Schiff bases derived from S-alkyldithiocarbazate with 2-pyridinecarboxaldehyde N-oxide-III. Syntheses, properties and structures of mononuclear nickel(II) complexes
A series of mononuclear nickel(II) complexes of two tridentate ligands, S-methyl- and S-benzyl-beta-N-(pyridine N-oxide-2-ylmethylidene)dithiocarbazate (SMPDH and SBPDH), were prepared and their magnetic properties, electronic and IR spectra were obtained. Both square planar and octahedral configurations were defined among these complexes. The crystal structure of [Ni(SMPD)ImH]ClO4 was determined by X-ray diffraction, and showed that the nickel atom lies in a square planar coordination environment.
Transition metal complexes of the Schiff bases derived from S-alkyldithiocarbazate with 2-pyridinecarboxaldehyde N-oxide—I. Synthesis, properties and structure of four-coordinate copper(II) complexes
Two new Schiff bases (SMPDH and SBPDH) of S-methyl- and S-benzyl-dithiocarbazate with 2-pyridinecarboxaldehyde N-oxide were prepared and confirmed by elemental analyses and IR spectra. Four copper(II) complexes of the above two Schiff base ligands with imidazole and pyridine were obtained and characterized spectroscopicaly. The crystal structure of [Cu(SMPD)ImH]ClO4 was determined by X-ray diffraction analysis. The geometry of the copper atoms in these complexes is square planar with an unsymmetrical environment.