Rh and ~(17)ONMR Study of Oligomer Rhodium(III) Sulfates in Aqueous Solutions

摘要

By virtue of ~(103)Rh-,~(17)O-NMR, electrophoresis in agarose gel, and pH-metry, we report on the formation of rhodium(EI) sulfate complexes in aqueous solutions. At higher concentrations of sulfuric acid (above 3 M), more than 90% of metal was found to stay in the state of symmetric polynuclear complexes containing magnetically equivalent rhodium atoms. We also labeled the ~(103)Rh-NMR chemical shifts for the complexes with 3,4 and 6 metal atoms in the spectra.