Synthesis and characterization of mono-ruthenium((]G0003[))-substituted Dawson polyoxotungstate derived by Br2 oxidation of the 1 : 2 complex of ruthenium((]G0002[))and[α2-P2W17O61]10-. ・・・. Journal of Chemical Society, Dalton Transaction. 2001. 9. 1506-1512