Yttrium alkyl complexes with a sterically demanding benzamidinate ligand: synthesis, structure and catalytic ethene polymerisation.

The benzamidinate yttrium dialkyl complexes [PhC(NAr)2]Y(CH2SiMe3)2(THF)n (Ar = 2,6-diisopropylphenyl; n = 1, 2) were prepared; when activated with [PhNMe2H][B(C6F5)4], the species with n = 1 polymerises ethene to polyethene with a narrow polydispersity.

[1]  G. Coates,et al.  Catalysts for the living insertion polymerization of alkenes: access to new polyolefin architectures using Ziegler-Natta chemistry. , 2002, Angewandte Chemie.

[2]  T. Nakano,et al.  Living polymerization of ethylene catalyzed by titanium complexes having fluorine-containing phenoxy-imine chelate ligands. , 2002, Journal of the American Chemical Society.

[3]  Paul G. Hayes,et al.  Cationic scandium methyl complexes supported by a beta-diketiminato ("Nacnac") ligand framework. , 2002, Journal of the American Chemical Society.

[4]  N. Kashiwa,et al.  Living Polymerization of Ethylene with a Titanium Complex Containing Two Phenoxy-Imine Chelate Ligands. , 2001, Angewandte Chemie.

[5]  J. Ziller,et al.  Double deprotonation of a cyclopentadienyl alkene to form a polydentate trianionic cyclopentadienyl allyl ligand system. , 2001, Journal of the American Chemical Society.

[6]  J. H. Teuben,et al.  Yttrium alkyl and benzyl complexes with amino-amidinate monoanionic ancillary ligands , 2000 .

[7]  G. Britovsek,et al.  The Search for New-Generation Olefin Polymerization Catalysts: Life beyond Metallocenes. , 1999, Angewandte Chemie.

[8]  R. Waymouth,et al.  Group 4 ansa-Cyclopentadienyl-Amido Catalysts for Olefin Polymerization. , 1998, Chemical reviews.

[9]  W. Schaefer,et al.  HIGHLY ELECTRON DEFICIENT GROUP 3 ORGANOMETALLIC COMPLEXES BASED ON THE 1,4,7-TRIMETHYL-1,4,7-TRIAZACYCLONONANE LIGAND SYSTEM , 1997 .

[10]  A. Mortreux,et al.  Synthesis of New Dialkylmagnesium Compounds by Living Transfer Ethylene Oligo- and Polymerization with Lanthanocene Catalysts† , 1996 .

[11]  J. DeSimone,et al.  Cobalt(III)-Catalyzed Living Polymerization of Ethylene: Routes to End-Capped Polyethylene with a Narrow Molar Mass Distribution , 1995 .

[12]  David Fischer,et al.  Stereospecific Olefin Polymerization with Chiral Metallocene Catalysts , 1995 .

[13]  A. Nakamura,et al.  Living Polymerization of Ethylene Catalyzed by Diene Complexes of Niobium and Tantalum, M(.eta.5-C5Me5)(.eta.4-diene)X2 and M(.eta.5-C5Me5)(.eta.4-diene)2 (M = Nb and Ta), in the Presence of Methylaluminoxane , 1995 .

[14]  M. Kakimoto,et al.  Synthesis of Amides and Amidines by Reaction of Carboxylic Acids and Amines in the Presence of Polyphophoric Acid Trimethylsilyl Ester (PPSE) , 1986 .