Synthesis and physico-chemical characterization of a new series of hydroxide ion acetylacetonate lanthanide(III) -- ditungsten decacarbonyl hydride complexes

摘要

A novel series of the heterometallic lanthanide(III) ionic cluster complexes of general formula Ln_9(acac)_(16)(OH)_(10)[W_2(CO)_(10)(mu-H)] with Ln = Sm (1a), Eu (1b), Gd (1c), Dy (1d), and Yb (1e) was prepared and characterized by FTIR, ~1H NMR spectroscopy and single crystal X-ray analysis. The cluster series was obtained by reaction in ethanol solution of the 2,4-pentanedionate hydrate of lanthanide(III), Ln(acac)_3 centre dot 3H_2O, with the hydridic ditungsten decacarbonyl, [W_2(CO)_(10)(mu-H)]~-. X-ray analysis showed that the complexes 1a-1e are isostructural. The complete structural characterization of the Eu derivative (1b) shows, similarly to their chromium derivative analogues, a square antiprismatic arrangement of the nona-lanthanide hydroxide ion acetylacetonate cationic cluster where the species [W_2(CO)_(10)(mu-H)]~- plays the role of the anionic counter ion.