This work is supported by the DFG and the University of Bielefeld.
Low-Valent Silicon in Formally Antiaromatic Four-Membered Ring Systems†
Article first published online: 14 JUL 2011
Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 50, Issue 39, pages 9020–9022, September 19, 2011
How to Cite
Jutzi, P. (2011), Low-Valent Silicon in Formally Antiaromatic Four-Membered Ring Systems. Angew. Chem. Int. Ed., 50: 9020–9022. doi: 10.1002/anie.201103254
- Issue published online: 15 SEP 2011
- Article first published online: 14 JUL 2011
- Manuscript Received: 12 MAY 2011
- University of Bielefeld
- low-coordinate silicon;
- low-valent compounds;
- organosilicon compounds;
The fundamental question of how silicon handles antiaromaticity in four-membered ring systems has been answered by the synthesis and characterization of the first tetrasilacyclobutadiene Si4Ar4 (1) and by the first dimeric silaisonitrile Si2(NAr′)2 (2). Compound 1 is best described by the charge-separated resonance structure 1′ and 2 by a structure with π-type lone pairs at the nitrogen atoms and vacant π orbitals at the silicon atoms.