Fiche publication
Date publication
mars 2009
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BELLEMIN-LAPONNAZ Stéphane
Tous les auteurs :
Ward BD, Lukesova L, Wadepohl H, Bellemin-Laponnaz S, Gade LH
Résumé
The C-3-symmetric trisoxazoline-supported scandium complex [Sc(iPr-trisox)(CH2SiMe3)(3)] (2) is highly active in the stereospecific polymerization of propene, 1-butene, 1-pentene, 1-hexene and 1-heptene, when activated with two equivalents of [Ph3C][B(C6F5)(4)]. The polymers thus produced were found to possess narrow molecular weight distributions and high levels of tacticity control (up to 99% mmmm). Some insight into the nature of the active species was obtained by H-1, C-13 and Si-29 NMR experiments. In particular, the formation of two equivalents of Ph3CCH2SiMe3 at ambient temperature was observed alongside a C-3-symmetric scandium complex tentatively assigned as the dication [Sc(iPr-trisox)-(CH2SiMe3)](2+). (C) Wiley-VCH Verlag GmbH & Co, KGaA, 69451 Weinheirn, Germany, 2009)
Référence
Eur J Inorg Chem. 2009 Mar;7:866-71.
