Titanium and zirconium complexes containing a novel dianionic trifunctional amido ligand

被引：70

作者：

Friedrich, S ^{[1
]}

Schubart, M ^{[1
]}

Gade, LH ^{[1
]}

Scowen, IJ ^{[1
]}

Edwards, AJ ^{[1
]}

McPartlin, M ^{[1
]}

机构：

[1] UNIV N LONDON,SCH APPL CHEM,LONDON N7 8DB,ENGLAND

来源：

CHEMISCHE BERICHTE-RECUEIL | 1997年 / 130卷 / 12期

关键词：

amido complexes; titanium; zirconium; alkylmetal compounds;

D O I：

10.1002/cber.19971301208

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The novel tridentate diamidoamine Ligands [RC(2-C5H4N)(CH2NSiMe3)(2)](2-) (R = H, CH3) have been synthesized and coordinated to Ti-IV and Zr-IV giving the pentacoordinate complexes [MX2{RC(2-C5H4N)(CH2NSiMe3)(2)}] (M = Ti, Zr; X = Cl, Br). The crystal structure analysis of [TiBr2{HC(2-C5H4N)(CH2NSiMe3)}] (10b) confirmed the involvement of the pyridyl function in the coordination to the metal centre occupying an apical position in the trigonal bipyramidal Ligand polyhedron. Alkylation of [TiCl2{H3CC(2-C5H4N)(CH2NSiMe3)(2)}] (12a) with one or two molar equivalents of [RMgCl] (R = PhCH2, Me3SiCH2, Me3SiC2) yielded the mono- and dialkyl complexes [TiClR{H3CC(2-C5H4N)(CH2NSiMe3)(2)}] and [TiR2{H3CC(2-C5H4N)(CH2NSiMe3)(2)}] in good yields. Depending on the steric demand of the alkyl group coordination or decoordination of the pyridyl group leads to four-or five-coordinate species. A crystal structure analysis of the pentacoordinate complex [TiCl(CH2SiMe3){H3CC(2-C5H4N)(CH2NSiMe3)(2)}] (16) was carried out.

引用

页码：1751 / 1759

页数：9

共 73 条

[1]

BAI YI, 1991, Z NATURFORSCH B, V46, P1357

[2] Synthesis of titanium and zirconium complexes that contain the tridentate diamido ligand, [((t-Bu-d(6))N-o-C6H4)(2)O](2-)([NON](2-)) and the living polymerization of 1-hexene by activated [NON]ZrMe2 [J].