Tetrahedral metal complexes of [MW 12O 40]-type (MAl III, Zn II) with dodecatungstate as tetrahedral ligand

Abstract

Tetrabutylammonium salts of 12-heteropolytungstates with central metal ions in a tetrahedral oxygen environment, MW 12O 40 (MAl, Zn), have been prepared and their spectroscopic data (IR, UV and MCD) presented. IR studies in acetonitrile solution suggest that the tetrahedral structure around AlO 4 moiety is largely distorted, whereas the ZnO 4 moiety retains excellent tetrahedral symmetry.