1. Département
de Chimie Physique, Université de Genève, 30 Quai
Ernest Ansermet, CH-1211 Genève, Switzerland
2. Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
3. Department of Chemistry,
Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
4. Faculty of Sciences, University of Liège, B-4000 Sart-Tilman, Belgium