Generation of Dicoordinate Boron(I) Units by Fragmentation of a Tetra-Boron(I) Molecular Square
| Autor: | Gerhard Bringmann, Matthias Grüne, Holger Braunschweig, Mehmet Ali Celik, Michael Hailmann, Maik Finze, Dominic Auerhammer, Merle Arrowsmith, Rian D. Dewhurst, Rüdiger Bertermann, Ivo Krummenacher, Thomas Hertle |
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| Rok vydání: | 2016 |
| Předmět: |
biology
010405 organic chemistry Inorganic chemistry chemistry.chemical_element General Chemistry 010402 general chemistry Ring (chemistry) biology.organism_classification 01 natural sciences Catalysis 0104 chemical sciences Adduct Crystallography chemistry.chemical_compound chemistry Fragmentation (mass spectrometry) Yield (chemistry) Tetra Molecular orbital Boron Phosphine |
| Zdroj: | Angewandte Chemie (International ed. in English). 55(46) |
| ISSN: | 1521-3773 |
| Popis: | Reduction of carbene-borane adduct [(cAAC)BBr2 (CN)] (cAAC=1-(2,6-diisopropylphenyl)-3,3,5,5-tetramethylpyrrolidin-2-ylidene) cleanly yielded the tetra(cyanoborylene) species [(cAAC)B(CN)]4 presenting a 12-membered (BCN)4 ring. The analysis of the Kohn-Sham molecular orbitals showed significant borylene character of the BI atoms. [(cAAC)B(CN)]4 was found to reduce two equivalents of AgCN per boron center to yield [(cAAC)B(CN)3 ] and fragmented into two-coordinate boron(I) units upon reaction with IMeMe (1,3,4,5-tetramethylimidazol-2-ylidene) to yield the corresponding tricoordinate mixed cAAC-NHC cyanoborylene. The analogous cAAC-phosphine cyanoborylene was obtained by reduction of [(cAAC)BBr2 (CN)] in the presence of excess phosphine. |
| Databáze: | OpenAIRE |
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