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• W2139450152 abstract "Reaction of YCl3·3.5THF with Cp*K followed by [PhC(NSiMe3)2]Li·OEt2 in THF gives the surprisingly stable yttrium cyclopentadienyl−benzamidinate chloride {Cp*[PhC(NSiMe3)2]Y(μ-Cl)}2 (1). Thermally induced redistribution of the various ligands leading to disproportionation of the molecule was not observed. The dimer does not split easily, e.g., it does not react with THF to give Cp*[PhC(NSiMe3)2]YCl·THF. Attempts to produce monomeric derivatives of 1 by substitution of the chloride by alkoxy, amide, or alkyl substituents using salt metathesis methodology were not successful. Reaction of 1 with 2 equiv of MeLi in the presence of TMEDA (TMEDA = N,N,N‘,N‘-tetramethylethylenediamine) afforded the structurally characterized Cp*[PhC(NSiMe3)2]Y(μ-Me)2Li·TMEDA (2). Compound 2 is a useful precursor for other yttrium pentamethylcyclopentadienyl−benzamidinate derivatives by controlled protolysis: with HC⋮CCMe3 or HOAr it yields Cp*[PhC(NSiMe3)2]Y(μ-C⋮CCMe3)Li·TMEDA (3) and Cp*[PhC(NSiMe3)2]YOAr (4), respectively." @default.
• W2139450152 created "2016-06-24" @default.
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• W2139450152 date "1996-03-19" @default.
• W2139450152 modified "2023-10-17" @default.
• W2139450152 title "Mono(pentamethylcyclopentadienyl)yttrium Compounds Stabilized by <i>N</i>,<i>N</i>‘-Bis(Trimethylsilyl)benzamidinate Ligands" @default.
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• W2139450152 doi "https://doi.org/10.1021/om9508187" @default.
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