A Novel Divalent Ytterbium Complex Supported by a Bridged Diamide Ligand: Synthesis and Structure of [{Me2Si(NPh)2Yb(THF)2}(μ3‐Cl)(μ4‐Cl){Li(THF)}2]2·2THF |
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| Authors: | Cheng‐Rong Lu Bei Zhao Li‐Ying Zhou Qi Shen Ying‐Ming Yao Yong Zhang |
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| Institution: | 1. Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Jiangsu 215123, China;2. Tel.: 0086‐0512‐65880306;3. Fax: 0086‐0512‐65880305 |
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| Abstract: | The reaction of anhydrous YbCl3 with 1 equiv. of Li2Me2Si(NPh)2 in THF, after workup, yielded a ytterbium(III) chloride {Me2Si(NPh)2Yb}(μ2‐Cl)(TMEDA)]2·3PhMe ( 1 ) (TMEDA=tetramethylethanediamine). The same reaction followed by treatment with Na‐K alloy afforded a new ytterbium(II) complex supported by a bridged diamide with four coordinated LiCl molecules, {Me2Si(NPh)2Yb(THF)2}(μ3‐Cl)(μ4‐Cl){Li(THF)}2]2·2THF ( 2 ) in high yield. Both complexes were structurally characterized by X‐ray analysis to be dimers. Complex 1 was a chlorine‐bridged dimer with ytterbium in a distorted octahedral geometry. In complex 2 two Me2Si(NPh)2Yb(THF)2]‐(μ3‐Cl)Li(THF)]2 moieties were connected with each other by two μ4‐Cl bridges to form a "chair‐form" framework. |
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| Keywords: | ytterbium complex bridged diamide synthesis crystal structure |
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