1. Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany, http://www.iac.uni‐stuttgart.de/Arbeitskreise/AkKaim/ index.html
2. Department of Chemistry, University of Reading, Whiteknights, Reading, UK, RG6 6AD
3. J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague, Czech Republic