1. University of Regensburg, Institute of Inorganic Chemistry, 93040 Regensburg (Germany)
2. Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev str. 3, Novosibirsk 630090 (Russia)
3. Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090 (Russia)
4. St. Petersburg State University, University pr. 26, 198504 Old Peterhoff, St. Petersburg (Russia)