Synthesis, spectroscopy and structures of o-diphenylphosphinobenzoic acid complexes of diorganotin (IV), palladium (II) and platinum (II)

The reactions of diorganotin oxides with o-diphenylphosphinobenzoic acid ([PPh2(o-C6H4COOH)], LH) in 1:1 stoichiometry afforded tetraorganodistannoxanes [{R2Sn(OOC-C6H4PPh2)}2O]2 (R = Me, Et, Prn, Bun). o-(Diphenylphosphino)benzoic acid complexes of palladium (II) and platinum (II) with the formulae [MCl2(LH)2], [MCl2(PR3)(LH)] (PR3 = PEt3, PBu3, PMePh2; M = Pd, Pt) have been prepared. Reactions of [{Bu2Sn(OOC-C6H4PPh2)}2O]2 with PtCl2(PhCN)2 in 1:1 and 1:2 ratio gave a complex mixture of products from which [Pt(O2CC6H4PPh2)2] was isolated. All the complexes have been characterized by elemental analyses, IR, NMR (1H, 13C{1H}, 31P{1H} and 119Sn{1H}) and UV–Vis spectroscopy. The stereochemistry of these complexes has been deduced from spectroscopic data. The structures of [{Bu2Sn(OOC-C6H4PPh2)}2O]2 and [Pt(O2CC6H4PPh2)2] have been established by X-ray crystallography.

Graphical abstractThe reactions of diorganotin oxides and palladium (II) and platinum (II) precursors with o-diphenylphosphinobenzoic acid ([PPh2(o-C6H4COOH)], LH) have been investigated and a variety of complexes have been isolated and characterized by elemental analyses, IR, NMR (1H, 13C{1H}, 31P{1H} and 119Sn{1H}) and UV–Vis spectroscopy. The stereochemistry of these complexes has been deduced from spectroscopic data. The structures of [{Bu2Sn(OOC-C6H4PPh2)}2O]2 and [Pt(O2CC6H4PPh2)2] have been established by X-ray crystallography.Figure optionsDownload full-size imageDownload as PowerPoint slide