Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
Chemistry. 2018 May 7;24(26):6843-6847. doi: 10.1002/chem.201800593. Epub 2018 Apr 23.
A family of doubly isonitrile-stabilized terphenyl borylenes could be obtained by addition of three equivalents of isonitrile to the corresponding Cr and W terminal terphenyl-borylene complexes. The mechanism of isonitrile- and carbon-monoxide-induced borylene liberation was investigated computationally and found to be significantly exergonic in both cases. Furthermore, addition of a small N-heterocyclic carbene (NHC) to a terminal Cr borylene complex results in release of an NHC-stabilized borylene carbonyl species, whereas the analogous reaction with bulkier phosphines results in metal-centered substitution.
通过向相应的 Cr 和 W 端基三联苯硼烯配合物中加入三当量的异腈，可以得到一系列双异腈稳定的三联苯硼烯配合物。通过计算研究了异腈和一氧化碳诱导硼烯释放的机理，发现这两种情况的反应均具有显著的放能特性。此外，向末端 Cr 硼烯配合物中添加一个小的 N-杂环卡宾（NHC），会导致释放出一个 NHC 稳定的硼烯羰基物种，而类似的与较大膦配体的反应则导致金属中心取代。
