作者:Marian Olaru、Maxie F. Hesse、Elena Rychagova、Sergey Ketkov、Stefan Mebs、Jens Beckmann
DOI:10.1002/anie.201710416
日期:2017.12.22
dichlorosilylene complex NHCDipp⋅SiCl2 reported by Roesky, Stalke, and co‐workers (Angew. Chem. Int. Ed. 2009, 48, 5683–5686), a few crystals of the salt [NHCDipp−H⋅⋅⋅Cl⋅⋅⋅H−NHCDipp]Si(SiCl3)3 were isolated, aside from the reported byproduct [NHCDipp−H+⋅⋅⋅Cl−], and characterized by X‐ray crystallography (NHCDipp=N,N‐di(2,6‐diisopropylphenyl)imidazo‐2‐ylidene). They contain the weakly coordinating anion Si(SiCl3)3−
密切关注的碱稳定的dichlorosilylene复杂NHC的制备过程卜先生⋅SiCl 2由Roesky,Stalke,和同事(报道Angew。化学式诠释。埃德。2009,48,5683-5686),有少量结晶盐的[NHC卜先生-H⋅⋅⋅Cl⋅⋅⋅H-NHC卜先生]的Si硅烷(SiCl 3)3进行分离,除了所报告的副产物[NHC卜先生-H + ⋅⋅⋅Cl - ],并且其特征在于X射线晶体学分析(NHC Dipp = N,N-二(2,6-二异丙基苯基)咪唑-2-亚基)。它们包含弱配位阴离子Si(SiCl 3)3 - ,这也是在高收率在所述共轭布朗斯台德酸在HSi硅烷(SiCl的去质子化得到的3)3与NHC卜先生或PMP(PMP = 1,2,2,6,6-五甲基)。通过DFT计算得出的HSi(SiCl 3)3的酸度明显高于其他H-硅烷的酸度。在Si上的电子结构,进一步研究DFT硅烷(SiCl 3)3