1. Inorganic Chemistry Research Group, Chemical Physics, Center for Chemistry and Chemical Engineering, Lund University, Box 124, 22100 Lund, Sweden, http://www.chemphys.lu.se/people/nordlander/
2. Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden, http://www.organ.su.se/himo/
3. Department of Chemistry, University of Joensuu, P. O. Box 111, 80101 Joensuu, Finland
4. Institute of Inorganic Chemistry, Georg August University Göttingen, Tammanstrasse 4, 37077 Göttingen, Germany
5. Department of Chemistry, Beloit College, 700 College St., Beloit, WI 53511, USA