Studies on polyoxo and polyperoxo-metalates_ Part 7. Lanthano- and thoriopolyoxotungstates as catalytic oxidants with H2O2 and the X-ray crystal structure of Na8[ThW10O36]·28H2O

The effectiveness of salts of [LnIIIW10O36]9 (LnY, La, Ce, Pr, Sm, Eu, Gd, Dy, Er, Lu) and [MIVW10O36]8 (MCe, Th)
as catalysts with H2O2 for alcohol oxidations and alkene epoxidations has been studied. It appears that catalysis arises from the
polyperoxotungstates formed from H2O2. The X-ray crystal structure of the title complex shows that in the [ThW10O36]8 anion
the thorium has square antiprismatic geometry in which eight oxygen atoms from two W5O18 moieties form vertex-sharing bonds;
Raman data suggest that the structure of the anion is retained in aqueous solution. New 31P[1H]-NMR data for
[LnIII{PW11O39}2]11 (LnY, La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Er, Yb, Lu) and [CeIV{PW11O39}2]10 in the solid state, in water
and in H2O2 solution are presented; these species have also been used for oxidation catalysis. © 2000 Elsevier Science S.A. All
rights reserved.