Abstract
The title complex [Li(THF) 4][ t BuCp)Yb(NPh 2) 3] was synthesized by the reaction of t-butylcyclopentadienyl ytterbium dichloride with 2 equivalents of LiNPh 2 in THF, hexane, and toluene at -78°C. The complex was characterized by elemental analysis, infrared and 1H-NMR spectroscopy. In addition, its crystal structure was determined by X-ray diffraction. The complex consists of isolated ion pairs [Li(THF) 4] + and [( t BuCp)Yb(NPh 2) 3] −. In the anion, the central metal Yb is surrounded by one t-butylcyclopentadienyl and three diphenylamino groups to form a distorted tetrahedron with the average bond length Yb N 2.264(9)A˚.
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