Coinage metals ternary tiosaccharinates: Synthesis, characterization and crystal structures of [Ag(tsac)(dppe)(CH3CN)]n and [{Cu(tsac)(dppe)}2(μ-dppe)]·4CH3CN

The effect of bidentated phosphanes upon thiosaccharinate coordination in ternary silver and copper complexes is analyzed. Three solid silver and copper-diphosphanes complexes with thiosaccharinate as counter anion [Ag(tsac)(dppe)(CH3CN)]n (1), [{Cu(tsac)(dppe)}2(μ-dppe)]·4CH3CN (2) and Ag2(tsac)2(dppm)3 (3) (tsac: thiosacharinate anion, dppm: bis(diphenylphosphanyl)methane, dppe: bis(diphenylphosphanyl)ethane) were synthesized and fully characterized by means of spectroscopic techniques (FTIR, UV–Visible, and 1H, 31P and 13CNMR). The crystal structures of complexes 1 and 2 were solved applying single crystal X-ray diffraction techniques. Complex 1 shows a 1-D polynuclear arrangement with dppe molecules bridging Ag(I) centers. Complex 2 is built by dinuclear units with two chelating and one bridging dppe molecules.

► Three solid silver and copper-diphosphanes complexes with thiosaccharinate as counter anion were synthesized.
► X-ray studies of two of the complexes showed that one of them was polynuclear while the other was dinuclear.
► 1H, 31P and 13CNMR, IR and UV-visible spectroscopy confirmed the structures.
► In all cases the thiosaccharinate anion coordinates through the exocyclic sulfur atom.