Tamara M. Polyanskaya, Vladimir V. Volkov, Caroline Price*, Мark Thornton-Pett* and John D. Kennedy*
Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 3, Novosibirsk 630090 (Russia) *School of Chemistry, University of Leeds, LS2 9JT Leeds (UK)
