1. Institute of Inorganic Chemistry, University Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
2. Institute of General and Theoretical Chemistry, Leopold-Franzens Universität Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
3. Department of Chemistry, University of Alberta, 11227 Saskatchewan Dr, Edmonton, Alberta, T6G 2G2, Canada
4. Institute of Chemistry, Saint Petersburg State University, Universitetskaya emb. 7/9, 199034 St Petersburg, Russia