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Dr. Kartik Chandra Mondal, Prof. Dr. Herbert W. Roesky, Martin C. Schwarzer, Prof. Dr. Gernot Frenking, Dr. Igor Tkach, Hilke Wolf, Daniel Kratzert, Dr. Regine Herbst-Irmer, Benedikt Niepötter and Prof. Dr. Dietmar Stalke Conversion of a Singlet Silylene to a stable Biradical Angewandte Chemie International Edition 52

Article first published online: 20 DEC 2012 | DOI: 10.1002/anie.201204487

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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[BOND]H activation and C[BOND]C bond formation in the presence of the biradical.

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