Inorganic Chemistry, Vol.42, No.21, 6592-6594, 2003
Titanium and zirconium amido complexes ligated by 2,2'-di(3-methylindolyl)methanes: Synthesis, characterization, and ethylene polymerization activity
2,2'-Di(3-methylindolyl)methanes (L2H2) are introduced as dianionic, bidentate ligands of reduced pi-donating ability. Four complexes of the type L2Ti(NEt2)(2) and L2Zr(NEt2)(2)(THF) have been synthesized and characterized by elemental analysis, NMR (H-1, C-13) spectroscopy, and X-ray crystallography. Structural data confirm the reduced pi-donating ability of the ill-indolyl moiety compared to that of diethylamido. Preliminary catalytic activities of these group 4 complexes for the polymerization of ethylene are reported.