The Effects of the BF2- and B(C2H5)2-substitiition for Bridging Hydrogen Atoms in the Cobalt(II), Nickel(II), and Copper(II) Complexes with Some Oximate Ligands

Abstract

Abstract Cobalt(II), nickel(II), and copper(II) complexes with dioximes substituted by BF2- and B(C2H5)2-groups for bridging hydrogen atoms were prepared. The BF2-substitution caused a red-shift of d-d band and increase of g⁄⁄-value for copper(II) complexes and positive shift of polarographic half wave potential of nickel(II) complexes. In the case of the B(C2H5)2-substituted complexes, such variations were not observed. The BF2-substituted cobalt(II) complexes are stable under an open atmosphere at room temperature in a solid state and in a DMF solution. These were interpreted in terms of the electron-withdrawing ability of BF2-group in the ligand.