Complexation of Rh(III) in diluted sulfuric acid solutions
摘要:
Complex formation in a system Rh(III)-H2SO4-H2O was studied by the Rh-103 and O-17 NMR spectroscopy at room temperature. The formation of two interrelated systems of mononuclear and polynuclear complexes was established in the above solutions. The predominant species in the first system is a labile ionic pair {Rh(H2O)(6)(3+) SO42-}(+), while in the second system, two inert binuclear complexes [Rh-2(mu-SO4)(2)(H2O)(8)](2+) and [Rh-2(mu-SO4)(mu-OH)(H2O)(8)](3+) prevail.