Dimerization of mono-ruthenium substituted α-Keggin-type tungstosilicate [α-SiW11O39RuIII(H2O)]5− to µ-oxo-bridged dimer in aqueous solution: synthesis, structure, and redox studies†
Abstract
We report the dimerization of a mono-ruthenium(III) substituted α-Keggin-type tungstosilicate [α-SiW11O39RuIII(H2O)]5− to a µ-oxo-bridged dimer [{α-SiW11O39Rum}2O]n− (m = III, n = 12; m = IV/III, n = 11; m = IV, n = 10). Single crystal X-ray structure analysis of Rb10[{α-SiW11O39RuIV}2O]·9.5H2O (triclinic, P, with a = 12.7650(6) Å, b = 18.9399(10) Å, c = 20.2290(10) Å, α = 72.876(3)°, β = 88.447(3)°, γ = 80.926(3)°, V = 4614.5(4) Å3, Z = 2) reveals that two mono-ruthenium substituted tungstosilicate α-Keggin units are connected through µ-oxo-bridging Ru–O–Ru bonds. Solution