Tris(trimethylsilylamino)silanes RSi(NHSiMe3)3. Synthesis, crystal and molecular structure of three dimeric trilithio derivatives
作者:D.J. Brauer、H. Bürger、G.R. Liewald、J. Wilke
DOI:10.1016/0022-328x(85)80086-3
日期:1985.6
infrared and Raman spectra determined. Reaction of I, II and PhSi(NHSiMe3)3 with n-butyllithium yielded the respective trilithio derivatives VI, VII and VIII, for which 1H and 7Li NMR, infrared and Raman spectra are reported. Each trilithio derivative has been shown by X-ray diffraction to form dimers in the solid state. Ignoring the phenyl groups in VIII, the symmetry of the dimers approaches m(D3d)
已经制备了MeSi(NHSiMe 3)3(I)和t-BuSi(NHSiMe 3)3(II),并确定了它们的1 H NMR,红外和拉曼光谱。I,II和PhSi(NHSiMe 3)3与正丁基锂的反应产生了各自的三硫代衍生物VI,VII和VIII,据报道其具有1 H和7 Li NMR,红外和拉曼光谱。每种三硫代衍生物已经通过X射线衍射显示出形成固态的二聚体。忽略VIII中的苯基,二聚体的对称性接近m(D 3 d)。二聚体可描述为六个锂原子的三角反棱形核心,两个RSi(NSiMe 3)3片段连接至该核心。每个氮原子和锂原子形成三个LiN键,因此Li 6 N 6团簇中的键缺乏电子。讨论了这些团簇与未变形的二十面体之间的关系。