EPR spectra of Cu2+ and VO2+ ions in tetraaquabis (pyridine) Co(II) saccharinate tetrahydrate ([Co(H2O)4(py)2](sac)2·4H2O) single crystals

The Cu2+ ions in Cosacpy exist in octahedral coordination with tetragonal distortion and the trend g∥>g⊥>ge shows the presence of unpaired electron mostly in the dx2-y2 orbital. This show that Cu2+ ions are characteristic of tetragonally elongated octahedral site, whereas the VO2+ ions are in the order of g∥|A⊥|, which confirms that V4+ ions in Cosacpy exist as VO2+ ions in octahedral coordination with tetragonal distortion and the trend g∥