1. Institute of Inorganic ChemistryUniversity of Regensburg Universitätsstr. 31 93040 Regensburg Germany
2. Nikolaev Institute of Inorganic ChemistrySiberian Division of RAS Acad. Lavrentiev str. 3 630090 Novosibirsk Russia
3. Novosibirsk State University Pirogova str. 2 630090 Novosibirsk Russia