화학공학소재연구정보센터
Inorganic Chemistry, Vol.36, No.2, 130-131, 1997
New Routes for Multiple Derivatization of Polyoxometalates, bis(Acetato)Dirhodium-11-Tungstophosphate, ((PO4)W11O35(Rh-2(Oac)(2)))(5-)
Hydrothermal reaction of lacunary [(PO4)W11O35](7-) with rhodium acetate dimer yields the novel dirhodium-substituted Keggin anion, [(PO4)W11O35{Rh-2(OAC)(2)}](5-)(1). An X-ray structure determination of the guanidiunium salt pf the dimethyl sulfoxide derivative of 1 confirms the structure deduced from proton and tungsten NMR spectroscopy. Oxidation of 1 to an unstable Rh-II,Rh-III derivative, and synthesis of other polytungstate analogs is possible. The tetrabutylammonium salt of 1 exhibits modest catalytic reactivity for cyclopropanation.