New ionic half-metallocenes of early lanthanides
| Autor: | Pascal Roussel, André Mortreux, Philippe Zinck, Michael Terrier, Marc Visseaux |
|---|---|
| Přispěvatelé: | Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Lanthanide
Polymers Ionic bonding Disproportionation Crystal structure [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Catalysis chemistry.chemical_compound Polymer chemistry Materials Chemistry Organic chemistry Molecule [CHIM.COOR]Chemical Sciences/Coordination chemistry Chemical synthesis Bimetallic strip and plastics elastomers 010405 organic chemistry Chemistry Mechanical Engineering Metals and Alloys Cationic polymerization [CHIM.CATA]Chemical Sciences/Catalysis 0104 chemical sciences X-ray diffraction [CHIM.POLY]Chemical Sciences/Polymers Mechanics of Materials Metallocene |
| Zdroj: | Journal of Alloys and Compounds Journal of Alloys and Compounds, Elsevier, 2008, 451, pp.352. ⟨10.1016/j.jallcom.2007.04.140⟩ Journal of Alloys and Compounds, 2008, 451, pp.352. ⟨10.1016/j.jallcom.2007.04.140⟩ 6th International Congress on F-Elements ICFE6 6th International Congress on F-Elements ICFE6, Sep 2006, Wroclaw, Poland. pp.xx-xx |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2007.04.140⟩ |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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