Synthesis and characterization of areneruthenium(II) dialkyldithiophosphate complexes: Single crystal structure of [Ru{SSP(OEt) 2}(η6-p-cymene) (PPh3) ][BPh4]

Article abstract of DOI:10.1016/0022-328X(95)06062-2

Reactions of [RuCl₂(η⁶-arene)]₂ with ammonium salt of dialkyldithiophosphoric acid in 1 : 1 and 1 : 2 stoichiometry readily gave complexes of the type [Ru{SSP(OR)₂}(Cl)(η⁶-arene)] (arene = benzene, p-cymene; R = Et, ⁿPr, ¹Pr, ⁿBu or ^sBu) and [Ru{SSP(OR)₂}₂(η⁶-arene)] (R = Et; arene = p-cymene). The former complexes, on treatment with NaBPh₄ in acetone followed by addition of a neutral donor ligand (L), afforded cationic complexes [Ru{SSP(OEt)₂}(η⁶-p-cymene)L][BPh₄] (L = py, PPh₃, (p-FC₆H₄)₃P, AsPh₃]. All the complexes were characterized by elemental analysis and NMR (¹H, ³¹P) data. A single crystal X-ray structure determination of [Ru{SSP(OEt)₂}(η⁶-p-cymene)(PPh₃)][BPh₄] has established an octahedral configuration around the ruthenium atom. The structure consists of a ruthenium centre bonded to an η⁶-p-cymene, a chelated dithiophosphate and a unidentate triphenylphosphine ligand.