title: Isolation of a benzene valence isomer with one-electron phosphorus-phosphorus bonds
abstract: A tetraphosphabenzene analog of the postulated anti-tricyclohexylene, a singlet biradical valence isomer of benzene, has been isolated. The tricyclic derivative features one-electron phosphorus-phosphorus bonds, which result from the pi*-pi* interaction between two diphosphirenyl radicals. Such one-electron bonds may play a wider role in phosphorus chemistry.
authors.affiliation: Y. Canac, D. Bourissou, A. Baceiredo, H. Gornitzka, G. Bertrand, Laboratoire de Chimie de Coordination du CNRS, 205, route de Narbonne, 31077 Toulouse Cedex, France. W. W. Schoeller, Fakultat fur Chemie der Universitat, Postfach 10 01 3.
authors.initials: Y
authors.lastname: Canac
authors.initials: D
authors.lastname: Bourissou
authors.initials: A
authors.lastname: Baceiredo
authors.initials: H
authors.lastname: Gornitzka
authors.initials: WW
authors.lastname: Schoeller
authors.initials: G
authors.lastname: Bertrand