Donor-Acceptor-Stabilized Silicon Analogue of an Acid Anhydride

摘要

A stable silicon analogue of an acid anhydride {PhC(Bu~tN)_2}Si{=O-B(C_6F_5)_3}O-Si(H){=O·B-(C_6F_s)_3}{(NBu~t)(HNBu~t)CPh} (4) with a O=Si-O-Si=O core has been prepared by treating monochlorosily-lene PhC(Bu~tN)_2SiCl (1) with H_2O·B(C_6F_5)_3 in the presence of NHC (NHC = l,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.