Abstract
We present the synthesis of two silyl beryllium halides HypSiBeX∙(thf) (HypSi = Si(SiMe3)3, X = Cl 2a, I 4a) and the molecular structure of 2a as determined by single crystal X-ray diffraction. Compounds 2a and 4a were characterized via multi-nuclear NMR spectroscopy (1H, 9Be, 13C, 29Si), and the bonding situation was further investigated using quantum chemical calculations (with the addition of further halides X = F 1b, Cl 2b, Br 3b, I 4b). The nature of the beryllium silicon bond in the context of these compounds is highlighted and discussed.
Highlights
The organometallic and coordination chemistry of beryllium has gained attention as several groups, including ours, started to focus their research on this rather unknown and hitherto neglected element [1]
Even in the field of material chemistry and catalysis, groups around the world started to investigate the unique properties of beryllium compounds [7]
The prejudices and reservations that people might have against beryllium due to its potential risks were discussed and elucidated in our recently reported review [8]
Summary
The organometallic and coordination chemistry of beryllium has gained attention as several groups, including ours, started to focus their research on this rather unknown and hitherto neglected element [1]. Part of our research focuses on the synthesis of heteroleptic beryllium compounds bearing at least one halide of the RBeX type (R = organic substituent, X = F, Cl, Br, I) and their structural characterization via single crystal X-ray diffraction, multi-nuclear NMR, and quantum mechanical calculations to achieve a deeper understanding of the bonding nature in beryllium compounds [4,9,10]. This led to several publications, which highlight the subtle influences of the substituents on the chemical and electronic properties of the resulting compounds.
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