Preparation of the hydrocarbon-soluble trifluoro complex LTiFb>3b> with a b2;-diketiminato ligand

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• 作者：Grigory B. Nikiforov ; Herbert W. Roesky ; Peter G. Jones
• 关键词：Titanium(IV) ; Fluoride ; b2 ; -Diketiminato complex ; Fluorine bridged complex ; Olefin polymerization
• 刊名：Journal of Fluorine Chemistry
• 出版年：2008
• 期刊代码：52_00221139
• 类别：ch
• 出版时间：May 2008
• 卷：129
• 期：5
• 页码：376-381
• 文件大小：396 K

摘要

The b2;-diketiminato fluoride complex (LTiFb>3b>) (1) (L = HC(CMeN(2,6-iPrb>2b>Cb>6b>Hb>3b>))b>2b>, “NacNac”) has been obtained using two synthetic routes, interaction of TiFb>4b> and NacNacK·2THF in toluene and interaction of LTiClb>3b> and 3 equiv. of Meb>3b>SnF in toluene. The trifluoro complex (LTiFb>3b>) (1) is soluble in the non-polar solvents toluene and hexane and moderately active in polymerization of ethylene; the activity is higher than that of LTiMeb>3b> and comparable with that of the oxo-bridged complexes LTiCl(bc;-O)b>2b>TiClL and LTiMe(bc;-O)b>2b>TiMeL·toluene. Compound 1 was characterized by single crystal X-ray structural analysis, elemental analysis, NMR spectroscopy, and mass spectrometry. Complex 1 in the solid state is a centrosymmetric dimer containing two LTiFb>2b> moieties connected by two bridging fluorines, whereas Cb>6b>Db>6b> and CDb>3b>CN solutions of 1 contain the monomeric complex at room temperature.