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Electronic Structure of Dimethylenecyclobutane-1,3-dione. Photoelectron Spectroscopic Investigation' Marie-Claire Lame and Jean-Louis Ripoll Laboratoire de Chimie des Composls thioorganiques, UA 480, Universitl de Caen, 14032 Caen, France Christophe Lafon, Daniele Gonbeau, and Genevieve Pfister-Guillouzo* Laboratoire de Physico-Chimie Mollculaire, UA 474, Institut Universitaire de Recherche Scientifique, 64000 Pau, France Received April 15, 1986 The He I PE spectrum of the transient title compound has been obtained by using the variable-temperature photoelectron spectroscopy technique. Agreement between the CIPSI calculations and experimental ion-state energies is very good. The electronic structure of this molecule is characterized by a net circumannular interaction and strong polar effects. |
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