Coordination Compounds of Silver Methanesulfonate with Triphenylphosphine and 1,2-Bis(4-Pyridyl)ethane

The reaction of Ag(CH₃SO₃) with PPh₃ gave the compound [Ag(CH₃SO₃)(PPh₃)₂] (I) and the reaction of Ag(CH₃SO₃) with PPh₃ and 1,2-bis(4-pyridyl)ethane (Dpe) affords the mixed complex [Ag(CH₃SO₃)(PPh₃)(Dpe)] (II). The crystal structures of I and II were determined by X-ray diffraction (CIF file CCDC no. 1563357 (for I)). In I, the centrosymmetric binuclear complex [Ag(CH₃SO₃)-(PPh₃)₂]₂ is formed. The Ag atom has a distorted tetrahedral coordination composed of two bidentate bridging O atoms of the sulfonate anion and two P atoms of two PPh₃ ligands. The structure of II is based on the centrosymmetric binuclear molecule with two bridging Dpe ligands between two [Ag(CH₃SO₃)(PPh₃)] complexes. The O atoms of the methanesulfonate ion are statistically disordered, which induces a considerable distortion of the silver polyhedron with C.N. 5. Both compounds tend to emit in the blue and green regions of the PL spectra.