Monomeric organoaluminium complexes RAl(OR*)2 and R2AlOR* with an optically active amino alkoxide ligand
作者:T Gelbrich、E Hecht、K.-H Thiele、J Sieler
DOI:10.1016/s0022-328x(99)00516-1
日期:2000.1
The reactions of trialkylaluminium, R3Al, with (S)-(−)α,α-diphenyl-2-pyrrolidinyl-methanol have been investigated, in which unusual bis-complexes RAl(OR*)2 were obtained [OR*=(S)-α,α-diphenyl-2-pyrrolidinyl-methoxide (Dpm), R=Me (1), Et (2), 1-Nor (3)]. A similar reaction carried out with R=t-Bu yields, by contrast, the expected mono-alkoxide R2AlOR* (4). All compounds were characterised by X-ray crystallography
研究了三烷基铝R 3 Al与(S)-(-)α,α-二苯基-2-吡咯烷基-甲醇的反应,得到了不寻常的双络合物RAl(OR *)2 [OR * = (S)-α,α-二苯基-2-吡咯烷基甲醇盐(Dpm),R = Me(1),Et(2),1-Nor(3)]。相比之下,以R =t- Bu进行的类似反应产生了预期的单醇盐R 2 AlOR *(4)。所有化合物均通过X射线晶体学和NMR光谱表征。分子结构是单体的。在1 – 3,与两个螯合配体的氮原子键合的铝中心是五配位的,而在4中包含的金属原子是四面体包围的。从X射线衍射数据确定所有配合物的绝对结构。在所有情况下,固定的AlN键的形成都是立体定向的。