Titanium and Zirconium Complexes That Contain the Tridentate Diamido Ligands [(i-PrN-o-C6H4)2O]2- ([i-PrNON]2-) and [(C6H11N-o-C6H4)2O]2- ([CyNON]2-)
| Autor: | Rüdiger Stumpf, Robert Baumann, Lan-Chang Liang, Richard R. Schrock, William M. Davis |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of the American Chemical Society. 121:7822-7836 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | A variety of five- and six-coordinate titanium and zirconium dialkyl complexes that contain the [(i-PrN-o-C6H4)2O]2- ([i-PrNON]2-) ligand have been prepared, among them [i-PrNON]Ti(CH2CHMe2)2, [i-PrNON]Ti(CH2CMe3)2, [i-PrNON]Zr(CH2CH3)2, and [i-PrNON]Zr(CH2CHMe2)2. These species serve as sources of complexes such as {[i-PrNON]Ti(PMe3)2}2(μ-N2), [i-PrNON]Ti(CHCMe3)(PMe3)2, [i-PrNON]Zr(CH2CHMe2)2(PMe3), and [i-PrNON]Zr(H2CCMe2)(PMe3)2. The reaction between [i-PrNON]Ti(CH2CMe3)2 and Me2PCH2CH2PMe2 in the absence of dinitrogen yields (i-PrNC6H4)(i-PrNC6H4O)Ti(dmpe), a pseudooctahedral species in which one aryl−oxygen bond has been cleaved. In all structurally characterized complexes in which the [i-PrNON]2- ligand is intact, it adopts a mer configuration in which the donor oxygen atom is planar. Analogous dialkyl complexes [CyNON]MR2 (Cy = cyclohexyl; M = Zr, R = Me, Et, i-Bu, CH2CMe3, allyl; M = Ti, R = Me, CH2CMe3, i-Bu) have also been prepared. Decomposition of [i-PrNON]Zr(CH2CH3)2 in the absence of phosph... |
| Databáze: | OpenAIRE |
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