Syntheses, crystal structures and properties of dinuclear hydrido-tris(3,5-diphenylpyrazol-1-yl)borate complexes with the S―S coupled and dimerized quinoxaline-2,3-dithiolate ligand

New dinuclear complexes with the bridging S―S coupled and dimerized quinoxaline-2,3-dithiolate (dsqdt) ligand, [TpPh2M(dsqdt)MTpPh2] (TpPh2 = hydro-tris(3,5-diphenylpyrazol-1-yl)borate; M = Co, 1; M = Ni, 2; M = Mn, 3), were prepared. X-ray crystal structure studies for complexes 1–3 indicate that the dsqdt ligand forms the unique κ2-coordinated mode through S and N atoms from the same qdt unit. The absorption spectra, redox behavior and magnetic properties of the compounds are reported.