Title of article :
Ligand exchanging reactions of M(acac)3 (M=Cr or Co) in Lewis acidic conditions
Author/Authors :
Nakano، Yoshiharu نويسنده , , Noguchi، Takatoshi نويسنده , , Adachi، Tsuneo نويسنده , , Sato، Shoichi نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
bis[2-(Dimethylaminomethyl)pyrrolyl]tantalum chloride (1) was prepared by treatment of the TaCl5 with 2 equiv. of [2(dimethylaminomethyl)pyrrolyl]lithium. The solid state structure of 1 shows the seven-coordinated tantalum atom, with a geometry corresponding to a pentagonal bipyramidal structure, in which two chlorine atoms occupy the axial position with the angle of 174.8(2)°. Furthermore, variable-temperature 1H NMR spectra infer the fluxionality of the two chelating pyrrolyl ligands with an estimated energy barrier of 13.8 kcal mol-1. Compound 1 shows no catalytic activity toward ethylene polymerization even activated with MAO.
Keywords :
Mixed metal complexes , Diaquo complexes , Lewis acid , Bidentate ligands , crystal structures
Journal title :
INORGANICA CHIMICA ACTA
Journal title :
INORGANICA CHIMICA ACTA