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The preparation of new oxoniobium(V) complexes from hydrated Niobium(V) Oxide: the crystal and molecular structure of Oxotris(2-pyridinolato-N-oxide)niobium(V)

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Abstract

Three oxoniobium(V) complexes ONbL3 with HL = tropolone (1), 2-pyridinol-N-oxide (2) or, 3-hydroxy-1,2-dimethyl-4(1H)-pyridone (3) are obtained in good yield by one step reactions from commercially available hydrated niobium(V) oxide in aqueous media. The products are characterized by elemental analysis, FT-IR spectroscopy, NMR spectroscopy (1H- and 13C-) and thermogravimetry. The crystal structure of oxotris(2-pyridinolato-N-oxide)niobium(V) is determined by single crystal X-ray diffraction, showing discrete molecules with pentagonal bipyramidal coordinated niobium. The 1H-NMR spectra of CDCl3 solutions indicate a fluxional behaviour for the three complexes.

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Authors and Affiliations

  1. Instituto de Química, Universidade de Brasília, 70904-970, Brasília, DF, Brazil

    Maria J. S. Serafím, Karl E. Bessler, Sebastião S. Lemos & Maria J. A. Sales

  2. Instituto de Física, Universidade de São Paulo, 13660-970, São Carlos, SP, Brazil

    Javier Ellena

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  1. Maria J. S. Serafím
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  2. Karl E. Bessler
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  3. Sebastião S. Lemos
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  4. Maria J. A. Sales
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  5. Javier Ellena
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Correspondence to Karl E. Bessler.

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Serafím, M.J.S., Bessler, K.E., Lemos, S.S. et al. The preparation of new oxoniobium(V) complexes from hydrated Niobium(V) Oxide: the crystal and molecular structure of Oxotris(2-pyridinolato-N-oxide)niobium(V). Transition Met Chem 32, 112–116 (2007). https://doi.org/10.1007/s11243-006-0142-x

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  • DOI: https://doi.org/10.1007/s11243-006-0142-x

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