R. Vatulescu et al., NEW HETEROPOLYOXOTUNGSTATE CONTAINING RH(III) AND NI(II) .2. CHARACTERIZATION BY STUDIES IN SOLUTION, Revue Roumaine de Chimie, 42(3), 1997, pp. 183-187
The present paper reports the results of the interpretation of UV and
visible absorption spectra of the anion [Ni(H2O)RhW11O39](7-) and the
behavior of this heteropolyoxotungstate towards the Amberlite IR-120 i
n the H+ form, The interpretation of the visible absorption spectra re
vealed that Ni(II) is octahedrally coordinated From the UV and visible
absorption spectra and from the behavior of the heteropolyanion in ac
idic medium indirect evidence has been obtained for the tetrahedral co
ordination of Rh(III) and for the formulation of the anion with Rh(III
) as central atom, respectively. By treatment with a H+ form ion excha
nger the acid H-5[RhW12O40] has been obtained.