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Kinetic C(2)-H exchange study ofcis-[(en)2Co(N-MeIm)OPO3H2]2+ by NMR: Evidence for the acidity of C(2)-H proton

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Abstract

The complexcis-[(en)2Co(N-MeIm)OPO3H2]Br2 (en=ethylenediamine, Me=methyl, Im=imidazole) has been synthesized from [(en)2Co(N-MeIm)Br]Br2, anhydrous AgCIO4, and H3PO4 (0.85%), and characterized by1H and13C nuclear magnetic resonance spectroscopy. C(2)-H exchange in this complex was studied over the pD range from 9.40 to 12.80 at 60 °C, wherecis-[(en)2Co(N-MeIm)OPO3D]+ andcis-[(en)2Co(N-MeIm)OPO3]0 are the kinetically important species. The kinetic data may be interpreted in terms of an intramolecular interaction of the −OPO 2−3 group and H-2 in the coordinated N-MeIm.

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Authors and Affiliations

  1. Department of Chemistry, University of Yazd, Yazd, Iran

    M. A. Amrollahi

  2. Department of Chemistry, University of Arak, Arak, Iran

    A. Mobinikhaledi

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  1. M. A. Amrollahi
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  2. A. Mobinikhaledi
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Correspondence to M. A. Amrollahi.

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Amrollahi, M.A., Mobinikhaledi, A. Kinetic C(2)-H exchange study ofcis-[(en)2Co(N-MeIm)OPO3H2]2+ by NMR: Evidence for the acidity of C(2)-H proton. Appl. Magn. Reson. 30, 1–6 (2006). https://doi.org/10.1007/BF03166976

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  • DOI: https://doi.org/10.1007/BF03166976

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