1. Institute of Inorganic Chemistry; Universität Regensburg; 93040 Regensburg Germany
2. Nikolaev Institute of Inorganic Chemistry; Siberian Division of RAS; Novosibirsk Russia
3. A. N. Nesmeyanov Institute of Organoelement Compounds RAS; Moscow Russia
4. N.D. Zelinsky Institute of Organic Chemistry RAS; Moscow Russia
5. Institute of Inorganic Chemistry and Structural Chemistry; Heinrich-Heine-Universität Düsseldorf; Germany