1. Inorganic Chemistry Research Group, Chemical Physics, Center for Chemistry and Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden
2. Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
3. Institute for Inorganic Chemistry, Georg-August-University Göttingen, Tammanstrasse 4, D-37077 Göttingen, Germany
4. Institute for Inorganic Chemistry, Christian-Albrechts-University Kiel, Olshausenstrasse 40, D-24098 Kiel, Germany
5. Dipartimento di Chimica “A. Mangini”, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy