Dinuclear hydride and η3-bonded dithioformate complexes of iron(II)

Abstract

Iron(II) chloride reacts consecutively with bis(diphenylphosphino)methane (dppm), activated magnesium and cyclopentadiene to give the mono- and di-iron hydrides [FeH(η-C₅H₅)(dppm)]1 and [{Fe(η-C₅H₅)}₂(µ-H)(µ-PPh₂)(µ-dppm)]2. Compound 2 contains three bridging units (average separation of the hydride from the metal atoms, 1.73 Å) in the solid state and crystallizes in the space group P2₁/c with a= 10.004(2), b= 20.134(7), c= 19.353(10)Å, β= 95.00(3)° and Z= 4. Compound 1 reacts with CS₂ to form the dithioformate complex [Fe(η-C₅H₅)(dppm-P)(S₂CH)]4. The sulfur-donor ligand is η³ co-ordinated in solution.