X-ray and spectroscopy studies of antisymbiotic effect O-coordination of the 4-methoxy benzoyl methylene triphenyl phosphorane ligand in palladium(II) complex

Complex [Pd(C₆H₄CH₂NH₂-k²-C,N)(Py)(OC (MeO-4-C₆H₄)CH-PPh₃)]OTf (1) (OTf = CF3SO3) represents the example of an ylide O-bound to a Pd(II) center that is unusual for the classical soft metals. O-coordination of ylides and cisoid structure of complex was demonstrated by single-crystal X-ray analyses and spectroscopy. The IR and NMR data of the product (1), formed by the reaction of Pd(II) with the same ylide, are similar to those of O-bounded ylide. Analytical data indicate a 1:1 stoichiometry between the ylide and Pd (II) in the product (1). The molar conductivity of (1) Λ = 175 Ω⁻¹ mol⁻¹ cm² is within the range for 1:1electrolytes.