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Dr. Kartik Chandra Mondal, Prof. Herbert W. Roesky, Martin C. Schwarzer, Prof. Gernot Frenking, Benedikt Niepötter, Hilke Wolf, Dr. Regine Herbst-Irmer and Prof. Dietmar Stalke A Stable Singlet Biradicaloid Siladicarbene: (L:)2Si Angewandte Chemie International Edition 52

Version of Record online: 10 JAN 2013 | DOI: 10.1002/anie.201208307

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A trapped silicon atom: The compound (L:)2Si with low-valent silicon was synthesized from its dichloride biradical precursor (L:)2SiCl2 by reduction with KC8. Theoretical analysis suggest that there are two donor–acceptor σ bonds L:[RIGHTWARDS ARROW]Si[LEFTWARDS ARROW]:L. There is one σ lone-pair orbital at Si and one π orbital which features significant π-back-donation L:[LEFTWARDS ARROW]Si[RIGHTWARDS ARROW]:L giving short Si[BOND]C bonds.

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