Synthesis, spectroscopic and X-ray structural studies of silver(I) complexes of -keto stabilized phosphorus ylides

Reactions between AgX (X = OTf, NO3) and ylides of the type Ph3P = CHC(O)C6H4-4-R (R = F, Br, OMe) in molar ratio 1 : 2 lead to complexes [Ag{CH(PPh3)C(O)C6H4-4-R}]X (1-4); X-ray structure determinations have been carried out on 4. The IR and NMR data of the products formed by reaction of Ag(I) with the ylides are consistent with C-bounded ylides. Analytical data indicate 1 : 2 stoichiometry between the ylide and Ag(I) in the products. The molar conductivities of these complexes are within the range for 1 : 1 electrolytes. Crystallographic data for 4 are: crystal system, triclinic; space group, P 1, a = 12.1151(4), b = 13.8989(5), c = 15.4855(5) angstrom, = 102.676(3)degrees, V = 2477.82(15) angstrom 3, Z = 2.