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Communication Dans Un Congrès Année : 2007

New ionic half-metallocenes of early lanthanides

Résumé

We present in this study a new and one-step method allowing the preparation of an unprecedented family of stable half-lanthanidocenes. X-ray analysis shows that the isolated compounds all display the same ionic Ln–Mg bimetallic structure consisting of two anionic (CpR)Ln(BH4)3 species and one cationic Mg(THF)6 (CpR =C5Me5, Ln = Nd, 1a, Ln = La, 1b; CpR =C5H5, Ln = Nd, 2a; CpR =C5H2Ph3, Ln = Nd, 3a). Such complexes display high stability with respect to disproportionation in solution. Combined with dialkylmagnesium, neodymium complexes provide powerful catalysts for stereospecific isoprene polymerisation.
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Dates et versions

hal-00187583 , version 1 (14-11-2007)

Identifiants

  • HAL Id : hal-00187583 , version 1

Citer

Marc Visseaux, Philippe Zinck, Michael Terrier, André Mortreux, Pascal Roussel. New ionic half-metallocenes of early lanthanides. 6th International Congress on F-Elements ICFE6, Sep 2006, Wroclaw, Poland. pp.xx-xx. ⟨hal-00187583⟩
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