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C−H versus O−H Bond Cleavage Reactions of Bis(2-hydroxyphenyl)phenylamine, PhN(o-C6H4OH)2:  Synthesis and Structural Characterization of Mononuclear and Dinuclear Tungsten Aryloxide Complexes Which Exhibit Bidentate, Τridentate, and Tetradentate Coordination Modes

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posted on 04.12.2006, 00:00 by Bryte V. Kelly, Joseph M. Tanski, Kevin E. Janak, Gerard Parkin
The phenylimino-bridged diphenol PhN(o-C6H4OH)2 reacts with W(PMe3)42-CH2PMe2)H to yield a variety of mononuclear and dinuclear complexes that include [κ2-PhN(C6H4OH)(C6H3O)]W(PMe3)4H2, [μ-κ22-PhN(C6H3O)2]{W(PMe3)4H2}2, [κ3-PhN(C6H4O)2]W(PMe3)3H2, [κ4-N(C6H4)(C6H4O)2]W(PMe3)3H, and [κ2-PhN(C6H4O)2]2W(PMe3)2 via O−H and C−H bond activation reactions. Structural characterization of these compounds by X-ray diffraction demonstrates that the derived alkoxide ligand is structurally flexible and can adopt bidentate, tridentate, and tetradentate coordination modes.