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 complexes with the dimerized quinoxaline-2,3-dithiolate ligand are synthesized.
• The dinuclear complexes show the new κ2(S, N)-coordination mode.
• The magnetic properties of the complexes are studied.

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.

Three dinuclear complexes with the bridging S―S coupled and dimerized quinoxaline-2,3-dithiolate ligand (dsqdt) have been synthesized and structurally characterized. The dsqdt ligand shows the new κ2(S, N)-coordination mode. The absorption spectra, electrochemical and magnetic properties for all complexes are studied.Figure optionsDownload as PowerPoint slide