The Structure of Bis(catecholato)silanes: Phase Adaptation by Dynamic Covalent Chemistry of the Si–O Bond
作者:Deborah Hartmann、Thaddäus Thorwart、Rosa Müller、Jean Thusek、Jan Schwabedissen、Andreas Mix、Jan-Hendrik Lamm、Beate Neumann、Norbert W. Mitzel、Lutz Greb
DOI:10.1021/jacs.1c09746
日期:2021.11.10
hypercoordinate complexes, the structure of tetracoordinate bis(catecholato)silane, Si(catH)21, has been enigmatic since its first report in 1951. Indeed, the claim of a planar-tetracoordinated silicon in 1 triggered a prominent debate, which is unsettled to this day. Herewith, we present a comprehensive structural study on 1 and derivatives in the gas phase by electron diffraction, in a neon matrix by IR
儿茶酚在硅的结构、生物和地球化学中发挥着独特的作用。尽管关于它们的超配位配合物存在大量知识,但四配位双(邻苯二酚)硅烷 Si(cat H ) 2 1的结构自 1951 年首次报道以来一直是个谜。1引发了一场突出的辩论,至今仍未解决。在此,我们对1进行了全面的结构研究和衍生物在气相中通过电子衍射,在氖基质中通过红外光谱,在溶液中通过扩散核磁共振光谱,在固态中通过 X 射线衍射和 MAS 核磁共振光谱,辅以高级量子化学计算. 该化合物表现出前所未有的相适应。在气相中,单体双(邻苯二酚)硅烷是四面体,但在凝聚相中,它对低聚是亚稳态的,其程度可通过邻苯二酚的类型、温度和浓度来控制。首次获得了快速 Si-O σ-键复分解反应的光谱证据。因此,这项研究整理了一场旷日持久的争论,并证实了我们地壳最丰富的化学键的动态共价特征。