Abstract
The reactions of (C 5H 5) 3Ln(THF) with 2,2′-ethylene-bis(4,6-di- tert-butylphenol) (EDBPH 2) in a 1:1 molar ratio in THF gave the cyclopentadienyl bis(phenolate) lanthanide complexes (C 5H 5)Ln(EDBP)(THF) 2 (Ln = Yb ( 1), Sm ( 2), Nd ( 3)) in nearly quantitative yields. The coordinated THF can be readily replaced by DME to give (C 5H 5)Ln(EDBP)(DME) (Ln = Yb ( 1a), Sm ( 2a)). Complexes 1 to 3 further reacted with 1 equivalent of isopropanol in THF to yield the neutral bis(phenolate) lanthanide isopropoxide [(EDBP) 2Ln( μ-OPr i)(THF) 2] 2 (Ln = Yb ( 4), Sm ( 5), Nd ( 6)) in high yields. The definitive molecular structures of complexes 1a, 5 and 6 were determined by X-ray diffraction analysis.
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