1. Institute of Physico-Chemical Problems, Belarusian State University, Leningradskaya St. 14, Minsk 220080, Belarus, Department of Chemistry, Moscow State University, Moscow 119899, Russia, Institute of Chemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow 117334, Russia, Institute of General and Inorganic Chemistry, Belarusian Academy of Sciences, Surganova St. 9, Minsk 220072, Belarus, and Institute of Inorganic Chemistry, University of Fribourg, Fribourg CH-1700, Switzerland