1. LCC-CNRSUniversité de Toulouse, CNRSUPS 205 route de Narbonne 31077 Toulouse Cedex 4 France
2. A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)Russian Academy of Sciences 28 Vavilov str., GSP-1, B-334 Moscow 119991 Russia
3. Univ RennesCNRS, ISCR—UMR 6226 35000 Rennes France
4. Institut Universitaire de France 1 rue Descartes 75231 Paris Cedex 05 France