AbstractNewN-silylated phthalimides, succinimides, and 1,8-napthalimides were synthesised by reactions of the alkali imides with chlorosilanes in THF. Six different mono-, di-, tri- and tetra-iminosilanes of the type (CH3)4–nSi(imide)nwere obtained and the products analysed with1H,13C,29Si NMR, and Raman spectroscopy. The molecular structures of four imidosilanes have been determined by single-crystal X-ray diffraction. A characteristic structural feature of the compounds is the fact that all intramolecular Si⋯O distances are significantly below the sum of the van-der-Waals radii of silicon and oxygen of 3.62 Å. Experimentally found values for Si⋯O distances range from 2.813 to 3.030 Å. However, there are no significant orbital interactions between silicon and oxygen atoms, as shown by quantum chemical analysis with AIM and NBO methods. The short Si⋯O distances in these molecules are caused by the geometry of the rigid imide group bound to the silicon atom, and there is no evidence for an increase of the coordination number of the Si atoms.
摘要通过在四氢呋喃(THF)中将碱金属亚胺与氯硅烷反应,合成了新的N-硅基取代酞酰亚胺、丁二酰亚胺和1,8-萘酰亚胺。得到了六种不同的一、二、三和四亚胺基硅烷,化学式为(CH3)4–nSi(imide)n,并使用1H,13C,29Si NMR和拉曼光谱分析了产物。四种亚胺基硅烷的分子结构已通过单晶X射线衍射确定。这些化合物的特征结构特点在于所有分子内的Si⋯O距离显著低于硅和氧的范德华半径之和,即3.62 Å。实验测得的Si⋯O距离范围从2.813到3.030 Å。然而,通过AIM和NBO方法的量子化学分析表明,硅和氧原子之间没有显著的重叠轨道相互作用。这些分子中短的Si⋯O距离是由硅原子连接的刚性的亚胺基团的几何形状造成的,没有证据表明硅原子的配位数增加。