Pt-IV-Containing Hexaplatinate(II) [(PtPtII)-Pt-IV O-6(6)(AsO2(CH3)(2))(6)](2-) and Hexapalladate(II) [(PtPdII)-Pd-IV O-6(6)(AsO2(CH3)(2))(6)](2-)

Identificador:  imarina:9325571

Handle: https://hdl.handle.net/20.500.11797/imarina9325571

Autors:  Zhang, JY; Bhattacharya, S; Khsara, BE; Nisar, T; Müller, A; Besora, M; Poblet, JM; Wagner, V; Kuhnert, N; Kortz, U

Resum:
The first PtIV-containing discrete polyoxoplatinate(II) [PtIVPtII6O6(AsO2(CH3)2)6]2- (Pt7) and polyoxopalladate(II) [PtIVPdII6O6(AsO2(CH3)2)6]2- (PtPd6) have been prepared and characterized in the solid state, in solution, and in the gas phase. The molecular structures of the noble metal-oxo clusters Pt7 and PtPd6 comprise a central, octahedral PtIVO6 hetero group surrounded by six square-planar MO4 (M = PtII, PdII) units, which are capped by six dimethylarsinate ligands. The polyanions were prepared under simple one-pot aqueous solution conditions by reacting H2Pt(OH)6 with either K2PtCl4 or Pd(NO3)2 in sodium dimethylarsinate buffer (pH 7) at 80 °C. Catalytic studies were performed on Pt7 supported on SBA15-apts for o-xylene hydrogenation at 300 °C and 90 bar H2 pressure and indicated excellent activity and recyclability with low activation temperature.