Donor–Acceptor-Stabilized Silicon Analogue of an Acid Anhydride

A stable silicon analogue of an acid anhydride {PhC(ButN)2}Si{O·B(C6F5)3}O–Si(H){O·B(C6F5)3}{(NBut)(HNBut)CPh} (4) with a OSi–O–SiO core has been prepared by treating monochlorosilylene PhC(ButN)2SiCl (1) with H2O·B(C6F5)3 in the presence of NHC (NHC = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene). Compound 4 has been characterized by elemental analysis and multinuclear NMR spectroscopic investigations. The molecular structure of 4 has been established by single-crystal X-ray diffraction studies, and DFT calculations support the experimental results.一种具有O=Si–O–Si=O核心的酸酐稳定硅类似物{PhC(ButN)₂}Si{=O·B(C₆F₅)₃}O–Si(H){=O·B(C₆F₅)₃}{(NBut)(HNBut)CPh}（化合物4），通过将一氯硅宾PhC(ButN)₂SiCl（化合物1）与H₂O·B(C₆F₅)₃在氮杂环卡宾（N-Heterocyclic Carbene，简称NHC，即1,3-双(2,6-二异丙基苯基)咪唑-2-亚基）存在下反应制得。化合物4已通过元素分析及多核核磁共振波谱表征完成结构鉴定。其分子结构经单晶X射线衍射分析确定，且密度泛函理论（Density Functional Theory，DFT）计算结果佐证了该实验结论。