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Issue 16, 2004
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o-(Cyclohexyliminoethyl)(arylamido)benzene and related complexes of zirconium and titanium. The non-innocence of the ketimino functionality

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Abstract

N-Arylamido complexes of zirconium in which the amido functional group is attached to an o-(alkyliminoethyl) substituted aromatic ring, have been synthesised by salt elimination reactions and characterised by spectroscopic and diffraction methods; they are analogous to the N-silylamido species recently reported (Dalton Trans., 2002, 3290–3299). The ligands 2-[CyN[double bond, length as m-dash]C(CH3)]C6H4N(H)(xyl), LxylH, and 2-[CyN[double bond, length as m-dash]C(CH3)]C6H4N(H)(mes) LmesH, Cy = C6H11, xyl = 3,5-Me2C6H3 mes = 2,4,6-Me3C6H2, were prepared in good yields by Buchwald–Hartwig amination of the arylbromides with 2-[CyN[double bond, length as m-dash]C(CH3)]C6H4NH2. Reaction of LmesLi with Zr(NEt2)2Cl2(thf)2 gave after chloride substitution the arylamido ketimino complex LmesZr(NEt2)2Cl 1; variable amounts of the arylamido vinylamido complex 2 were also obtained. Interaction of LmesLi or LxylLi with Ti(NMe2)2Cl2 gave rise to the tripodal bis-amido amino complexes 5 and 6 possibly formed by ligand rearrangement involving migration of the dimethylamido group to the ketimino carbon.

Graphical abstract: o-(Cyclohexyliminoethyl)(arylamido)benzene and related complexes of zirconium and titanium. The non-innocence of the ketimino functionality

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Publication details

The article was received on 19 Mar 2004, accepted on 25 Jun 2004 and first published on 19 Jul 2004


Article type: Paper
DOI: 10.1039/B404173A
Citation: Dalton Trans., 2004,0, 2556-2562
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    o-(Cyclohexyliminoethyl)(arylamido)benzene and related complexes of zirconium and titanium. The non-innocence of the ketimino functionality

    R. M. Porter and A. A. Danopoulos, Dalton Trans., 2004, 0, 2556
    DOI: 10.1039/B404173A

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