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

Abstract

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) Å, β = 102.676(3)°, V = 2477.82(15) ų, Z = 2.

Keywords:

• Phosphorus ylide
• Silver(I) complexes
• X-ray crystal structure

Acknowledgements

The authors acknowledge the Department of Chemistry, Isfahan University of Technology and the Faculty of Arts and Sciences, Ondokuz Mayıs University, Turkey, for the use of the Stoe IPDSII diffractometer (purchased under grant F. 279 of the University Research Fund).