Silver(I) cis-diphenylphosphinoethylene complexes: Spectroscopic and structural characterization

Adducts of the diphosphine cis-Ph2P(CH-CH)PPh2 (L) with AgX (X = NO3, BF4, ClO4 or CF3SO3) have been synthesized and characterized both in solution (H-1, P-31 NMR) and in the solid state (IR, single crystal X-ray structure analysis). The topologies of the structures in the solid state were found to depend on the nature of the counter-ion X. The adduct AgNO3:L (2:1)(2) is tetranuclear, derivative of the chair form, the bidentate ligands bridging peripheral silver centers, the nitrates being coordinated through two oxygen atoms, the first O,O'-bridging, the second bridging bidentate. (C), 2008 Elsevier B.V. All rights reserved.