Synthesis and Characterization of Tris(trimethylsilyl)methyl Halide Derivatives of Aluminum: Potential Precursors for Low-Valent Aluminum Compounds. Crystal Structures of [{(Me3Si)3
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- 作者：Christoph Schnitter ; Klaus Klimek ; Herbert W. Roesky ; Thomas Albers ; Hans-Georg Schmidt ; Cord Rö ; pken ; and Emilio Parisini
- 刊名：Organometallics
- 出版年：1998
- 出版时间：May 25, 1998
- 年：1998
- 卷：17
- 期：11
- 页码：2249 - 2257
- 全文大小：141K
- 年卷期：v.17,no.11(May 25, 1998)
- ISSN：1520-6041
文摘
The novel bulky alkylaluminum dihalogenides[(Me3Si)3CAlX2·THF](X = F, 1; X = Cl, 4;X = Br, 5; X = I, 6) and dialkylaluminumhalogenides[(Me3Si)3CAl(Me)X·THF] (X= Cl, 8;X = Br, 9; X = I, 10) have been prepared byreaction of the mixed trialkylalane[(Me3Si)3CAlMe2·THF] withMe3SnX (X = F, Cl) and X2 (X = Br, I)in a 2:1 and 1:1 molarratio, respectively. The coordinated THF molecule of compound1 can be removed by heatingin vacuo to yield the trimeric solvent-free organoaluminum difluoride[{(Me3Si)3CAlF2}3](2). Compound 2 shows no cocatalyticactivity with group 4 metallocenes for ethylenepolymerization. Reaction of[(Me3Si)3CAlF2·THF](1) with potassium fluoride gave theunusual coordination compound[{(THF)2K(Me3Si)3CAlF2(
-F)F2AlC(SiMe3)3}2](3). Themolecular structures of compounds 2-6 have beendetermined by X-ray structure analysis.Compound 2 is the first structurally characterizedorganoaluminum difluoride, and 6 is thefirst structurally characterized organoaluminum diiodide.
-F)F2AlC(SiMe3)3}2](3). Themolecular structures of compounds 2-6 have beendetermined by X-ray structure analysis.Compound 2 is the first structurally characterizedorganoaluminum difluoride, and 6 is thefirst structurally characterized organoaluminum diiodide.