DIFFERENT BEHAVIOR OF (NBU4)[M(C6F5)2(ACAC)] (M = PD, PT) TOWARD AGCLO4 - X-RAY CRYSTAL-STRUCTURES OF (NBU4)[M2AG(C6F5)4(ACAC)2] (M = PD, PT)

The reactions between (NBu4)[M(C6F5)2-(acac)] (M = Pd (1), Pt (2)) and AgClO4 (molar ratio 2:1) yield the polynuclear derivatives (NBU4)[M2Ag(C6F5)4-(acac)2] (M = Pd (3), Pt (4)). The structures of both complexes have been established by X-ray diffraction methods. For the palladium compound, two Pd(CrF5)2-(acac) fragments are bonded to the silver center through the C3 atom of the acetylacetonate, while in the platinum complex the Pt(C6F5)2(acac) fragments are connected to the silver atom by forming two Pt-Ag bonds. Crystal data for 3. monoclinic; space group P2/c; a = 9.578 (2), b = 9.253 (2), c = 31.261 (6) angstrom; beta = 96.70 (3)-degrees, V = 2751.8 (10) angstrom3, Z = 2, mu = 1.108 mm-1; 3102 observed reflections (F> 4sigma(F)) for 332 parameters; R = 0.042, R(w) = 0.046, gof = 0.878. Crystal data for 4.CH2Cl2: monoclinic; space group P2(1)/c; a = 15.128 (3), b = 19.414 (4), c = 19.832 (4) angstrom; beta = 100.02 (3)-degrees, V = 5736 (2) angstrom3, Z = 4, mu = 5.404 mm-1; 7564 observed reflections (F > 4sigma(F)) for 732 parameters; R = 0.040, R(w) = 0.044, gof = 1.043.