Add time:07/19/2019         Source:sciencedirect.com

The synthesis and characterization of new polynuclear lanthanide(III) ionic clusters of general formula [Ln9(acac)16(OH)10]+ [Mo2(CO)10(μ-H)]− (Ln = Sm, Eu, Gd, Dy, Yb) and [Sm9(acac)16(OH)10]+ [CrW(CO)10(μ-H)]− is reported. The polynuclear complexes, prepared under pure nitrogen atmosphere by interaction of the hydridic metal carbonyls with the β-dichetonate Ln(acac)3·3H2O (Ln = Sm, Eu, Gd, Dy, Yb). The new clusters were characterized by elemental analysis, complexometric titration for Ln, atomic absorption for Cr, W and Mo, gas-volumetric analysis for CO, FTIR spectroscopy and single crystal X-ray structure determination of [Sm9(acac)16(OH)10][Mo2(CO)10(μ-H)]. The Eu and Yb complexes are isostructural to the Sm one for which, similarly to their homonuclear chromium and tungsten derivative analogues, a square antiprismatic arrangement of eight Sm ions with the ninth at the center of the antiprism has been found.

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