Struktur eines Silaethen-Aminaddukts

✍ Scribed by Wiberg, Nils ;Joo, Kwang-;Suk ;Polborn, Kurt

• Book ID: 101815534
• Publisher: Wiley (John Wiley & Sons)
• Year: 1993
• Tongue: English
• Weight: 285 KB
• Volume: 126
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19931260112

✦ Synopsis

Structure of a Silaethene Amine Adduct

The reaction of Me~2~SiBr‐CBr(SiMe~2~Ph)~2~ with PhLi in the presence of NEtMe~2~ leads to EtMe~2~N…︁SiMe~2~…︁C(SiMe~2~Ph)~2~ (3). NEtMe~2~ is coordinated to the central silicon. The SiN distance is comparably long (1.988 Ȧ). The bond distance between the central (distorted tetrahedra) silicon and the central (planar) carbon (1.761 Ȧ) is longer than the SiC distances in silaethenes (1.70 Ȧ) and shorter than the SiC distances in silaethanes (1.87 Ȧ). From a comparison of structures of D…︁SiMe~2~ \documentclass{article}\pagestyle{empty}\begin{document}$ \underline \cdots $\end{document} C(SiR~3~)~2~ it is concluded that increasing Lewis basicity of D (THF < NEtMe~2~ < F¯) leads to a SiC bond lengthening and to more regularity in the geometry of the distorted tetrahedral silicon.