1. Institute of Chemistry
2. St. Petersburg State University
3. St. Petersburg
4. Russia
5. Department of Inorganic Chemistry
6. University of Regensburg
7. 93040 Regensburg
8. Germany
9. Nikolaev Institute of Inorganic Chemistry SB RAS
10. Novosibirsk 630090
11. Novosibirsk State University
12. Philipps-Universität Marburg
13. D-35032 Marburg