硅亚基-硼烷路易斯对作为捕获水分子的工具：硅醇形成和脱氢。
A Silylene-Borane Lewis Pair as a Tool for Trapping a Water Molecule: Silanol Formation and Dehydrogenation.
机构信息
Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.
Institut für Chemie, Technische Universität Berlin, Theoretische Chemie/Quantenchemie, Sekr. C7, Straße des 17. Juni 135, 10623, Berlin, Germany.
出版信息
Chemistry. 2019 Mar 27;25(18):4678-4682. doi: 10.1002/chem.201900481. Epub 2019 Mar 8.
The Lewis acid B(C F ) and the cyclic silane (Ar Si) (1) (Ar =o-(CH ) NCH C H ) are useful precursors to access the silylene(II)-borane adduct Ar Si-B(C F ) (2). Treatment of 2 with water led to coordination and gave the Lewis pair (Ar H O)Si-B(C F ) (3) that exhibits a hydrogen-bond-stabilized silanol unit. It can be converted into the siloxane [(HAr ) SiOB(C F ) ] O (6) by dehydrogenation in the presence of a base. Heteronuclear NMR spectroscopic data to characterize the compounds were supported by quantum-chemical calculations.
路易斯酸 B(CF₅) 和环状硅烷 (Ar Si) (1)(Ar = o-(CH₂)₂NCH₂C₆H₅) 是将二硅烷(II)-硼烷加合物 Ar Si-B(CF₅) (2) 转化为有用的前体。用 2 处理水会导致配位，并生成路易斯对 (Ar H O)Si-B(CF₅) (3)，其中含有氢键稳定的硅醇单元。它可以在碱的存在下通过脱氢转化为硅氧烷 [(HAr) SiOB(CF₅)] O (6)。用量子化学计算支持了异核 NMR 光谱数据来表征这些化合物。
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