The synthesis, characterization, and reactivity of three-fold (1σ, 2π) donor complexes of tungsten and tantalum have been explored. (η⁵-C₅Me₅)W(=NAr)₂Cl (1) has been prepared from the reaction of W(=NAr)₂Cl₂(THF)₂ with Li(C₅Me₅). Complex 1 can be functionalized by sigma-donor ligands, but 1 reacts with 1σ, 1π donors such as 2,6-diisopropylphenylamide to give the intramolecular C-H bond activated product, (η⁵-C₅Me₄CH₂)W(=NAr)₂(5). [(η⁵-C₅Me₅)Ta(=NAr)₂Cl)]⁻ was synthesized by reacting (η⁵-C₅Me₅)TaCl₄ or (η⁵-C₅Me₅)Ta(NAr)Cl₂ (6) with excess of 2,6-diisopropylphenylamide. The mechanism of formation of [(η⁵-C₅Me₅)Ta(=NAr)₂Cl)]⁻ was investigated. Structures of (η⁵-C₅Me₅)W(=NAr)₂Cl (1) and [Li(OEt₂)][(η⁵-C₅Me₅)Ta(NAr)₂Cl] (7) are reported.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/291830 |
| Date | January 1994 |
| Creators | Baldwin, Theodore Chambers, 1969- |
| Contributors | Wigley, David E. |
| Publisher | The University of Arizona. |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Thesis-Reproduction (electronic) |
| Rights | Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. |
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