Silver(I) tertiary phosphine complexes: Influence of the anion on the structural and spectroscopic properties

Two-, three- and four-coordinate silver(I) complexes, AgX (X = CN−, PF6-, and SbF6-), with triphenyl phosphine, tricyclohexyl phosphine, diphenylcyclohexyl phosphine, and dicyclohexylphenyl phosphine have been synthesised and characterised by single crystal X-ray diffraction, elemental analysis, infrared spectroscopy, and 13C and 31P NMR spectroscopy. From the reaction of a metal salt to phosphine ligand ratio of 1:1 the various compounds crystallize as 1:2, 1:3, and 1:4 compounds [Ag(PPh2Cy)3(CN)]·5H2O (1), [Ag(PCy3)2]·PF6 (2), [Ag(PPh3)4)]·SbF6·CHCl3 (3), [Ag(PCy3)2]·SbF6 (4), [Ag(PPh2Cy)2(C3H6O)]·SbF6 (5), and [Ag(PPhCy2)2]·SbF6.CHCl3 (6) monomers, with a wide variety of geometries around the central silver(I) atom. Compounds 1 and 3 have slightly distorted tetrahedral geometry around the silver(I) atom. The compounds 2, 4, and 6 show linear geometry around the metal centre, while compound 5 has a distorted trigonal planar geometry. The elemental analysis and NMR spectroscopic results are consistent with the single crystal structural analyses.

Two-, three- and four-coordinate silver(I) complexes, AgX (X = CN-, PF6-, and SbF6-), with various tertiary phosphines have been synthesized and characterized by single crystal X-ray diffraction, elemental analysis, infrared spectroscopy, and 13C and 31P NMR spectroscopy. 1:2, 1:3, and 1:4 compounds were obtained, with a wide variety of geometries around the central silver(I) atom, including distorted tetrahedral, linear and distorted trigonal planar.Figure optionsDownload as PowerPoint slide