Cationic Group 4 metal alkyl compounds containing aryloxide ligation: synthesis, structure, reactivity and polymerization studies
作者:Matthew G Thorn、Zac C Etheridge、Phillip E Fanwick、Ian P Rothwell
DOI:10.1016/s0022-328x(99)00409-x
日期:1999.12
A series of bis(alkyl) derivatives of titanium and zirconium [(ArO)2MR2] (M=Ti, Zr; R=Me, CH2Ph; ArO=various 2,6-di-substituted phenoxides) has been synthesized and their reactivity towards the Lewis acid [B(C6F5)3] examined. The benzyl compounds generate stable zwitterionic species such as [M(OC6HPh2-2,6-R2-3,5)2(CH2Ph)][η6-C6H5CH2B(C6F5)3] (M=Ti, R=H, 12; Me, 13: M=Zr, R=Me, 15). Structural studies
合成了一系列钛和锆的双(烷基)衍生物[(ArO)2 MR 2 ](M = Ti,Zr; R = Me,CH 2 Ph; ArO =各种2,6-二取代的酚盐)以及它们对路易斯酸[B(C 6 F 5)3 ]的反应性。的苄基化合物产生稳定的两性离子物质如[M(OC 6 HPH 2 -2,6-R 2 -3,5-)2(CH 2 PH)] [η 6 -C 6 H ^ 5 CH 2 B(C 6 ˚F 5)3 ](M = Ti,R = H,12; Me,13:M = Zr,R = Me,15)。对12和15的结构研究表明,硼阴离子通过原始的苄基苯基环与金属中心π结合。相反,用[B(C 6 F 5)3 ]处理苄基化合物[Zr(OC 6 H 3 Bu t 2 -2,6)2(CH 2 Ph)2 ]会导致环金属化的化合物[Zr( OC 6 H 3 Bu t -CMe 2 CH 2)(OC 6 H 3 Bu吨2 -2