Ein ungewöhnlicher trimerer Bimetallkomplex mit dem Gerüst [Zr3(μ2-OH)3(μ3-O)Li5] durch Reaktion von Zirconiumorgano- und -hydrido-Komplexen mit Wasser |
| |
Authors: | Dirk Walther Beatrix Ritter Helmar Grls Gernot Zahn |
| |
Institution: | Dirk Walther,Beatrix Ritter,Helmar Görls,Gernot Zahn |
| |
Abstract: | An Unusual Trimeric Bimetallic Li? Zr Complex with the Backbone Zr3(μ2-OH)3(μ3-O)Li5] by Reaction of Zirconiumorgano and Hydrido Complexes with Water The reaction of compounds of the type (LZr)(LiH)(L′)]n and (LZr)(LiH)(L′)(alkyne)]n (L: 2,2′-Biphenolato-dianion, L′: thf, Bu3P, alkyne: Ph? C?C? SiMe3, CH?CH) with water at 0°C in a thf solution results in the formation of th trimeric bimetallic complex 8 (L2Zr)3(μ2-OH)3(μ3-O)Li5(thf)8(H2O)5] in 50% yield. The X-ray analysis of 8 shows that a planar six-membered ring Zr3(μ2-OH)3 is formed. In the middle of this ring is a dianionic oxygen atom placed, coordinating to the three L2Zr centres in a planar μ3-coordination (bond angles 120,05μ). Five lithium ions stabilize the anionic backbone by bridging the biphenolato chelate ligands, which form seven-membered chelate rings with the atoms. 1H-, 13C-, and 7Li-NMR spectra exhibit that the solid state structure remains unchanged in solution (thf). |
| |
Keywords: | Zirconium Lithium Hydroxoligands Oxoligand |
|
|