1. Institut für Anorganische Chemie; Universität Regensburg; 93040 Regensburg Germany
2. Nikolaev Institute of Inorganic Chemistry; Siberian Division of Russian Academy of Sciences, Acad. Lavrentyev Prosp, 3; 630090 Novosibirsk Russia
3. Novosibirsk State University; ul. Pirogova, 3 630090 Novosibirsk Russia
4. Institute of Chemistry; St. Petersburg State University; 199034 Universitetskaya emb. 7/9 St. Petersburg Russia