Organometallic Compounds of the Lanthanides. 183 Lanthanide Benzyl Complexes of the Type [Li(tmeda)2][Ln(CHRSiMe2R′)3Cl] (Ln = Pr, Nd, Sm, Er, Lu; R = Ph, 3,5-Me2C6H3; R′ = Me,tBu, Ph) and [Li(tmeda)]2(μ-Cl)3Ln(CHPhSiMe2tBu)2(Ln = Er, Lu)
作者： Herbert Schumann , Dominique M. M. Freckmann , Sebastian Dechert
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摘要: PrCl3, NdCl3, SmCl3, ErCl3, and LuCl3 react with three mole equivalents of [Li(tmeda)][CHPhSiMe3] (1), [Li(tmeda)][CHPhSiMe2tBu] (2), [Li(tmeda)][CHPhSiMe2Ph] (3), [Li(tmeda)][CH(C6H3Me2-3,5)SiMe2tBu] (4) forming the ate complexes [Li(tmeda)2][Ln(CHPhSiMe3)3Cl] (Ln = Pr (5a), Nd (6a), Sm (7a)), [Li(tmeda)2][Ln(CHPhSiMe2tBu)3Cl] (5b), (6b), (7b)), [Li(tmeda)2][Pr(CHPhSiMe2Ph)3Cl] (5c), [Li(tmeda)2][Ln(CH(C6H3Me2-3,5)SiMe2tBu)3Cl] Er (8d), Lu (9d)). {[Li(tmeda)]2[Nd(CHPhSiMe3)Cl4]}2 (10) {[Li(tmeda)][Nd(CHPhSiMe3)Cl3(THF)]}2 (11) crystallize from concentrated ethereal solutions 6a after addition pentane. 4 reacts two ErCl3 yielding [Li(tmeda)]2(μ-Cl)3Ln(CHPhSiMe2tBu)2 (12), (13)). Compounds 7a,b, 9d, 13 have been characterized by 1H 9d also 13C NMR spectroscopy, compounds 6b, 7a, 8d, 10, 11, 12, X-ray structure analysis.
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