1. A.
E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, A.E. Arbuzov str. 8, Kazan 420088, Russia
2. A.
M. Butlerov Chemistry Institute, Kazan Federal University, Kremlevskaya
str. 18, 420008, Kazan, Russia
3. Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova
str. 28, 119334 Moscow, Russia
4. IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany