کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1324659 | 1499946 | 2009 | 6 صفحه PDF | دانلود رایگان |

Treatment of diphenyl-β-diketiminatoaluminum dihydride, LAlH2 [1, L = {H5C6–NC(Me)}2CH] with neopentyl- or trimethylsilylmethyllithium afforded the corresponding alkylderivatives LAlH(R) [R = CH2–SiMe3 (2), CH2–CMe3 (3)] by the precipitation of lithium hydride. Deprotonation of a methyl group instead of salt elimination occurred by the similar reaction of the more basic alkyllithium compound LiC(SiMe3)3. The reactions of the hydrides 1–3 with tert-butyl hydrogenperoxide did not yield the expected peroxo derivatives, instead the dialuminoxanes LAl(R)–O–Al(R)L [R = OCMe3 (5), CH2SiMe3 (6), CH2CMe3 (7)] were isolated in high yields. Their Al–O–Al bridges deviated from linearity and had Al–O–Al bond angles of about 155° on average.
The reactions of β-diketiminatoaluminum hydrides with tert-butyl hydrogenperoxide open the facile access to dialuminoxanes having almost linear Al–O–Al bridges.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 694, Issues 7–8, 1 April 2009, Pages 1101–1106