1. Institute of Ecology of the Volga River Basin; Russian Academy of Science; Togliatti 445003 Russia
2. Lebedev Research Institute of Synthetic Rubber; St. Petersburg 198035 Russia
3. State Research Institute of Chemistry and Technology of Organoelement Compounds; Moscow 111123 Russia
4. Research Institute for Physical Chemical Problems of the Belarusian State University; Minsk 220030 Belarus