Novel O,O'-donor oxo-MoIV hydrotris(3-isopropylpyrazolyl)borate complexes formed by chelation of potentially hydrogen-bonding phenolate ligands on reduction of dioxo-MoVIcomplexes

VWL Ng; MK Taylor; LMR Hill; JM White; CG Young

Journal article

Novel O,O'-donor oxo-MoIV hydrotris(3-isopropylpyrazolyl)borate complexes formed by chelation of potentially hydrogen-bonding phenolate ligands on reduction of dioxo-MoVIcomplexes

VWL Ng, MK Taylor, LMR Hill, JM White, CG Young

European Journal of Inorganic Chemistry | WILEY-V C H VERLAG GMBH | Published : 2010

DOI: 10.1002/ejic.201000214

Abstract

The oxo-MoIV complexes formed in the reactions of cisTp iPrMoVIO2 (OAr-R) [TpiPr = hydrotris(3-isopropyipyrazol-1yl)borate, -OAr-R = phenolate derivative] complexes with PEt3 or PEt2Ph in acetonitrile depend on the nature of the potential hydrogen-bonding group (R) incorporated into the phenolate ligand. Green, diamagnetic, oxo(phosphoryl)MoIV complexes, TpiPrMoIVO(OAr-R)(OPR'3), are produced when R is absent or is a non-coordinating group such as 2OMe and 3-NEt2; six-coordinate TpiPrMoO(OC6H 4OMe-2)(OPEt3) was structurally characterized and exhibits a distorted octahedral geometry typical of such species. When R is a carbonyl functionality, complete oxygen atom transfer leads to green or pu..

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Jonathan White Author

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Funding Acknowledgements

We thank Assoc. Prof. Brendan F. Abrahams for assistance with crystallographic studies and Dr. Stephen P. Best for assistance with cyclic voltammetric simulations. We gratefully acknowledge the financial support from the Australian Research Council and the Donors of the Petroleum Research Fund (administered by the American Chemical Society).