Nature of Si–H Interactions in a Series of Ruthenium Silazane Complexes Using Multinuclear Solid-State NMR and Neutron Diffraction
作者:Katharine A. Smart、Mary Grellier、Yannick Coppel、Laure Vendier、Sax A. Mason、Silvia C. Capelli、Alberto Albinati、Virginia Montiel-Palma、Miguel A. Muñoz-Hernández、Sylviane Sabo-Etienne
DOI:10.1021/ic4027199
日期:2014.1.21
same RuSi3H motif. Detailed structural characterization of the RuSi3H complexes with X-ray diffraction, and in the case of triazabicyclo complex [Ru(H)κ-Si,N-(SiMe2)(C7H12N3)}3] (3a), neutron diffraction, enabled a reliable description of the moleculargeometry. The hydride ligand of (3a) is located closer to two of the silicon atoms than it is to the third. Such a geometry differs from that of the previously
制备了三种新的N-杂环-硅氮烷化合物1a – c,并用作钌的双齿配体,产生了一系列[Ru(H)(κ- Si,N-(SiMe 2 -N-杂环)} 3个具有相同RuSi 3 H基序的配合物(3a – c)。RuSi 3 H配合物的详细结构表征,包括X射线衍射,以及三氮杂双环配合物[Ru(H)κ-Si,N- (SiMe 2)(C 7 H 12 N 3)} 3 ](3a),中子衍射可以可靠地描述分子的几何形状。(3a)的氢化物配体比与第三个硅原子更靠近两个硅原子。这种几何形状不同于先前报道的络合物[Ru(H)(κ- Si,N-(SiMe 2)N(SiMe 2 H)(C 5 H 4 N)} 3 ](3d)通过中子衍射,发现氢化物与所有三个硅原子等距。DFT研究表明,对称和不规则的异构体基本上是简并的。有关动力学和Ru···H··Si相互作用的信息从多核固态获得(1H wPMLG,29 Si CP