Ab initio theoretical methods that incorporate effects of orbital rela
xation and electron correlation are used to examine the possibility th
at doubly or triply charged oxy anions of the class SO42-, SeO42-, TeO
42-, or PO43-, AsO43-, SbO43- are stable relative to electron detachme
nt in the absence of any surrounding medium. In all of these cases, ou
r findings indicate quite clearly that these multiply charged oxy anio
ns are not stable.