Nickel Complexes with Bis(8-quinolyl)silyl Ligands. An Unusual Ni<sub>3</sub>Si<sub>2</sub> Cluster Containing Six-Coordinate Silicon
作者:Jian Yang、Iker Del Rosal、Meg Fasulo、Preeyanuch Sangtrirutnugul、Laurent Maron、T. Don Tilley
DOI:10.1021/om1004622
日期:2010.11.8
slowly decomposes in dichloromethane-d2 to (PhClSiQn2)NiCl (6), a Ni(I) chloride complex in which the phenyl group is bonded to the nickel with an intramolecularly coordinated (silyl)arene ligand. The η2-coordination of the aryl group involves interaction of ipso and ortho carbonatoms with the metal center. Theoretical studies of 6 support a very weak Ni−Si interaction (2−3 kcal/mol at the NBO level) that
描述了将双(8-喹啉基)甲基甲硅烷基(Me-NSiN;1 = Me-NSiNH)和双(8-喹啉基)苯基甲硅烷基(Ph-NSiN;2 = Ph-NSiNH)配体安装到镍上的努力。1与NiCl 2(DME)和N i Pr 2 Et的反应通过硅烷的降解得到[[ i Pr 2 EtNH)2 Cl] [(QnH)NiCl 3 ](3 ; Qn =喹啉基)。2与Ni(COD)2在氯苯中的反应生成[Ph-NSiN] 2 Ni 3 Cl 2(5),这是具有[Ni 3 Si 2 ]核的甲硅烷基镍簇的罕见例子。通过X射线结构确定,发现存在一个带有两个表面覆盖的甲硅烷基的三角形Ni 3核:一个对称地键合到三个镍原子,而另一个不对称地键合。已经通过计算方法研究了5中的键合,以获得分子轨道的描述。Si(1)的不对称键合是由于与Ni(1)的双电子键相互作用引起的,这解释了短的Si(1)-Ni(1)接触(2.2688(