Neutral Pentacoordinate Halogeno- and Pseudohalogenosilicon(IV) Complexes with an SiSONCX Skeleton (X=F, Cl, Br, I, N, C): Synthesis and Structural Characterization in the Solid State and in Solution
作者:Stefan Metz、Bastian Theis、Christian Burschka、Reinhold Tacke
DOI:10.1002/chem.201000152
日期:——
pentacoordinate silicon(IV) complexes with an SiSONCX skeleton (X=F, Cl, Br, I, N, or C) was synthesized and structurally characterized by multinuclear solution‐state and solid‐state NMR spectroscopy and single‐crystal X‐ray diffraction. These compounds contain an identical tridentate dianionic S,N,O ligand, a monodentate (pseudo)halogeno ligand (F, Cl, Br, I, NCS, N3, or CN), and a monodentate organyl ligand
合成了一系列具有SiSONCX骨架的中性五配位硅(IV)配合物(X = F,Cl,Br,I,N或C),并通过多核溶液状态和固态NMR光谱以及单晶进行了结构表征X射线衍射。这些化合物包含相同的三齿双阴离子S,N,O配体,单齿(伪)卤素配体(F,Cl,Br,I,NCS,N 3,或CN),以及单齿有机基配体(甲基,苯基,4-(三氟甲基)苯基或五氟苯基)。对于大多数这些化合物,观察到溶液中五配位的硅(IV)配合物和两个同分异构的四配位硅物种之间的动态平衡。最令人惊讶的是,比较含有氟,氯,溴或碘配体的两个类似化合物系列表明,在这些系列的硅(IV)配合物中,五元配位以I≈Br> Cl> F的顺序排列是有利的。即,增加卤代配体的柔软度有利于五元配位。