Anderson-type heteropolyanions of molybdenum(VI) and tungsten(VI)

摘要: Abstract The previously reported preparation of some Anderson-type molybdopolyanions containing divalent metal ions (Zn, Cu, Co or Mn) as a heteroatom has been reinvestigated. Zn(II) and Cu(II) were confirmed, although the polyanion was not stable could be recrystallized. On other hand, polyanions Co(II) Mn(II) reproduced. Another type heteropoly compound, [X(H2O)6-x(Mo7O24)]4− [X = Cu(II), Mn(II)], isolated solids, which are thermally. mixed-type Anderson polyanions, [Ni(II)Mo6-xWx,O24H6]4−, have questioned mixtures species with different x values, also reinvestigated using IR, UV absorption MCD spectra. They single species, but mixtures, positional isomers may present for compounds where 2-4. possibility oxidation structure maintained examined. [Ni(II)Mo6O24H6]4− by S2O2−8 ion in aqueous solution gave Waugh-type [Ni(IV)Mo9O32]6− polyanion, whereas [Ni(II)W6O24H6]4− no compound.