The (xy)2(x2−y2) Vacancy Configuration in Co(II)-Formazan
ESR spectra of two formazanyl cobalt(II) complexes were observed at room temperature, 77, and 4 K. The parallel components (g//) and the perpendicular components (g⊥) of their g values satisfied a relation g// > g⊥ > 2. These results could be interpreted by a rare three-vacancy configuration of (xy)2(x2−y2) in d-orbitals.