1. Institut für Anorganische Chemie; Universität Regensburg; 93051 Regensburg Germany
2. Nikolaev Institute of Inorganic Chemistry; Siberian Division of RAS; Acad. Lavrentyev str. 3 630090 Novosibirsk Russia
3. Novosibirsk State University; Pirogova str. 2 630090 Novosibirsk Russia