1. Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstrasse 15 76131 Karlsruhe Germany
2. Nikolaev Institute of Inorganic Chemistry SB RAS; Prosp. Lavrentieva 3 630090 Novosibirsk Russia
3. Novosibirsk State University; Pirogova str. 2 630090 Novosibirsk Russia
4. Institute of Inorganic Chemistry; University of Regensburg; 93040 Regensburg Germany