摘要:
An equimolar mixture of TiF4 and Ti(NMe2)(4) in CH3CN gave orange crystals of [TiF2(NMe2)(2)](4) in good yield. This complex is a cyclic tetramer of TiF2(NMe2)(2), where each titanium atom is bonded to one terminal fluoride and terminal amide ligands and to two pairs of bridging fluoride and bridging amide ligands. This complex was employed as a catalyst for polymerizations of ethylene, propylene, and styrene in the presence of methylaluminoxane (MAO); the activity was relatively low for these olefin polymerizations. (C) 2003 Elsevier Science B.V. All rights reserved.