Neutral and cationic yttrium alkyl complexes with linked 1,4,7-triazacyclononane-amide monoanionic ancillary ligands: synthesis and catalytic ethene polymerisationElectronic supplementary information (ESI) available: experimental, spectroscopic and polymerization details. See http://www.rsc.org/suppdata/cc/b1/b101012n/Netherlands Institute for Catalysis Research (NIOK) publication no. RUG 01-4-01.
Abstract
Yttrium dialkyl complexes [N,N′-R2-tacn-N″-(CH 2)2NBut]Y(CH2SiMe3) 2 (R = Me, Pri; tacn = 1,4,7-triazacyclononane) were prepared; when activated with [PhNMe2H][B(C6F5)4] these complexes form cationic alkyl species that are active ethene polymerisation catalysts.