Syntheses, structural characterisation and electronic structures of ferrocenyl-osmafuran heterobinuclear organometallic complexes.

The heterobinuclear complex OsCl(PPh)[CHC(PPh)CFcO] (Fc = (CH)Fe(CH)) (1) in which the two metal centers were connected by the skeleton of the osmafuran and cyclopentadienyl was synthesized via a one-pot reaction of OsCl(PPh) and FcCOC[triple bond, length as m-dash]CH in high yield. Three derivatives (Os(η-OCOO)(PPh)[CHC(PPh)CFcO] (2), Os(NCS)(PPh)[CHC(PPh)CFcO] (3), and OsCl(dppb)[CHC(PPh)CFcO] (dppb = PhP(CH)PPh) (4)) were obtained by the ligand substitution reactions of complex 1 with different reagents (CsCO (2), NaSCN (3) and dppb (4)), respectively. All of these complexes were characterized by NMR spectroscopy and elemental analysis and the structures of complexes 1, 3 and 4 were further confirmed by single crystal X-ray diffraction.