Dicarbollide Analogues of the Constrained-Geometry Polymerization Catalyst
作者:Dae-Hyun Kim、Je Hong Won、Sung-Joon Kim、Jaejung Ko、Sang Hern Kim、Sungil Cho、Sang Ook Kang
DOI:10.1021/om010297p
日期:2001.10.1
A new type of constrained-geometry complex, [eta (5):eta (1)-RC2B9H9-CH2NMe2]TiCl2 (3), based on the dimethylamino dicarbollyl ligand has been prepared and characterized by B-11, C-13, and H-1 NMR spectroscopy. This complex is the first example of a compound containing the "CGC-type" dicarbollyl ligand for titanium in its highest (4+) oxidation state. Complexes 3 in the presence of MMAO exhibit moderate catalytic activities for the ethylene polymerization but produce high-molecular-weight polymers.