1. Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 7/9 199034 St. Petersburg Russia
2. Nikolaev Institute of Inorganic Chemistry; Siberian Division of RAS; Acad. Lavrentyev prosp. 3 630090 Novosibirsk Russia
3. Department of Natural Sciences; Novosibirsk State University; Ul. Pirogova, 2 630090 Novosibirsk Russia
4. Institut für Anorganische Chemie; Universität Regensburg; Universitätsstr. 31 93049 Regensburg Germany