Synthesis, X-ray Crystal Structure, and Stability of Novel Trialkylalane−Triorganylbismuthane Adducts
作者:Andreas Kuczkowski、Stephan Schulz、Martin Nieger
DOI:10.1002/1099-0682(200109)2001:10<2605::aid-ejic2605>3.0.co;2-x
日期:2001.9
Reactions of trialkylalanes AlR3 (R = Me, Et, tBu) and triorganylbismuthanes BiR′3 (R′ = iPr, SiMe3) were performed and the products investigated both in solution and in the solid state. Et3Al−Bi(SiMe3)3 (2), tBu3Al−Bi(SiMe3)3 (3), and tBu3Al−Bi(iPr)3 (6) are stable Lewis acid−base adducts in pure form while only 3 and 6 are adducts in solution. Their dissociation enthalpies, as determined by temperature-dependent
进行了三烷基丙烷 AlR3(R = Me、Et、tBu)和三有机基铋 BiR'3(R' = iPr、SiMe3)的反应,并在溶液和固态下研究了产物。Et3Al−Bi(SiMe3)3 (2)、tBu3Al−Bi(SiMe3)3 (3) 和 tBu3Al−Bi(iPr)3 (6) 是稳定的纯路易斯酸碱加合物,而只有 3 和 6 是加合物在解决方案中。它们的解离焓,由依赖于温度的 NMR 光谱确定,估计为 6.3 (3) 和 6.9 kcal/mol (6)。相比之下,Me3Al−Bi(SiMe3)3 (1)、Et3Al−Bi(SiMe3)3 (2)、Me3Al−Bi(iPr)3 (4) 和 Et3Al−Bi(iPr)3 (5) 是完全离解的在解决方案中。化合物 1-6 通过多核 NMR 光谱 (1H, 13C)、质谱和元素分析进行表征。此外,通过单晶X射线衍射确定了2和6的晶体结构。