A thermoanalytical study of dipicolinic acid acting as a terdentate ligand in coordination compounds of divalent metal ions |
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| Authors: | G D&#x;Ascenzo A Marino M Sabbatini T Bica |
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| Institution: | Institute of Analytical Chemistry, University of Rome, Rome Italy |
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| Abstract: | The coordination compounds obtained by reaction of hot solutions of dipicolinic acid with the carbonates of the divalent metal ions manganese(II), iron(II), cobalt(II), nickel(II), copper(II) and zinc(II) are studied using TG, DSC and HTRS techniques. For the thermal stability a sequence Mn > Fe > Zn > Co > Ni > Cu may be observed. This series is compared with the similar series obtained with isocinchomeronic acid. The thermal stability is, for each metal of the series, isocinchomeronic > dipicolinic. Thermal stability is discussed in terms of the intermolecular bonds, of the structures and of the stability constants of the complexes examined. |
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