This work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie.
Article first published online: 22 DEC 2003
Copyright © 1995 by VCH Verlagsgesellschaft mbH, Germany
Angewandte Chemie International Edition in English
Volume 34, Issue 5, pages 555–557, March 20, 1995
How to Cite
Niecke, E., Fuchs, A., Baumeister, F., Nieger, M. and Schoeller, W. W. (1995), A P2C2 Four-Membered Ring with Unusual Bonding—Synthesis, Structure, and Ring Opening of a 1,3-Diphosphacyclobutane-2,4-diyl. Angew. Chem. Int. Ed. Engl., 34: 555–557. doi: 10.1002/anie.199505551
Dedicated to Professor Peter Paetzold on the occasion of his 60th birthday
- Issue published online: 22 DEC 2003
- Article first published online: 22 DEC 2003
- Manuscript Received: 29 SEP 1994
- ab initio calculations;
- electronic structure;
- phosphorus compounds
An open form of a 2,4-diphosphabicyclobutane is one way to describe the unprecedented structure of the P2C2 heterocycle 1 (Ar = 2,4,6-tBu3C6H2). Ab initio calculations on 1 show that a partially delocalized π system exists with a considerable diradical contribution. Dark red 1 is accessible from ArP CCl2 and nBuLi.