We warmly thank the National Science Foundation for Grant NSF CHE 8802800, the U.S. Public Health Service for Grant GM-12640. and S.E.R.C./N.A.T.O. for support for R. T.
The Taming of Cyclobutadiene†
Article first published online: 22 DEC 2003
Copyright © 1991 by VCH Verlagsgesellschaft mbH, Germany
Angewandte Chemie International Edition in English
Volume 30, Issue 8, pages 1024–1027, August 1991
How to Cite
Cram, D. J., Tanner, M. E. and Thomas, R. (1991), The Taming of Cyclobutadiene. Angew. Chem. Int. Ed. Engl., 30: 1024–1027. doi: 10.1002/anie.199110241
- Issue published online: 22 DEC 2003
- Article first published online: 22 DEC 2003
- Manuscript Received: 3 MAY 1991
The taming of cyclobutadiene was accomplished in the interior of the hemicarcerand 1. Cyclobutadiene is a stable compound with a singlet ground state when it is synthesized in the interior of 1. In order to synthesize the incarcerated cyclobutadiene and to characterize its structure, one bimolecular, three photochemical, and two thermal reactions were carried out in the interior of 1. The authors consider it both realistic and useful to regard the internal phase of carcerands and hemicarcerands as a new state of matter.