Unprecedented phosphino copper(I) derivatives of tris(pyrazolyl)methanesulfonate ligand co-ordinated to metal in an unusual K3-N,N',O fashion

New copper(I)triorganphosphine derivates [Cu(R3P)(Tpms)]have been synthesised from the reaction of CuCl with PR3 (R=phenyl or p-tolyl) and lithium tris(pyrazolyl)methanesulfonate(Tpms). The complexes obtained have been characterised by elemental analyses and FT-IR in the solid state and by NMR (1H and 31P[1H]) spectroscopy and conductivity measurements in solution. Single crystal structural characterisations were undertaken for [Cu(Ph3P)(Tpms)]which is the first example of structurally characterised complex containing the [Tpms] ligand co-ordinated to a metal ion in an unusual k3-N,N',O fashion.