Conversion of a Singlet Silylene to a stable Biradical

Silicon becomes colored: Stable biradicals were prepared from an N‐heterocyclic carbene stabilized SiCl2 and a cyclic alkyl(amino)carbene, and characterized as two polymorphs. The deep‐blue crystals of one polymorph are stable upon exposure to air for about a week, while the solution in THF decompos...

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Veröffentlicht in:	Angewandte Chemie International Edition 2013-02, Vol.52 (6), p.1801-1805
Hauptverfasser:	Mondal, Kartik Chandra, Roesky, Herbert W., Schwarzer, Martin C., Frenking, Gernot, Tkach, Igor, Wolf, Hilke, Kratzert, Daniel, Herbst-Irmer, Regine, Niepötter, Benedikt, Stalke, Dietmar
Format:	Artikel
Sprache:	eng
Schlagworte:	Activation biradicals Bonding Carbenes Carbon - chemistry Conversion Crystallography, X-Ray Crystals cyclic alkyl(amino)carbenes Decomposition EPR spectroscopy Exposure Free Radicals - chemistry Heterocyclic Compounds - chemistry Hydrogen - chemistry Methane - analogs & derivatives Methane - chemistry Molecular Conformation N-heterocyclic carbenes Quantum Theory Silicon Silicon Compounds - chemistry singlet silylenes Thermodynamics
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Beschreibung
Zusammenfassung:	Silicon becomes colored: Stable biradicals were prepared from an N‐heterocyclic carbene stabilized SiCl2 and a cyclic alkyl(amino)carbene, and characterized as two polymorphs. The deep‐blue crystals of one polymorph are stable upon exposure to air for about a week, while the solution in THF decomposes rapidly when exposed to air. In a side reaction, the different carbene species react with each other under CH activation and CC bond formation in the presence of the biradical.
ISSN:	1433-7851 1521-3773
DOI:	10.1002/anie.201204487