Abstract
By means of the cathode differential pulse polarography on a mercury drop electrode the reactions of Zn2+, Cd2+, and Pb2+ ions with the spiro[pyridobenzopyranes] of the indoline series in DMSO were studied. Tetrabutylammonium perchlorate was used as the background electrolyte. It is found that well soluble heavy metal complexes of the spiro[indolin-pyridobenzopyranes] are formed in DMSO. The number of ligands, the step and the general stability constants of the obtained complex compounds are evaluated. The distribution curves of all the complexes under investigation are plotted. The spiropyrane complexes were also studied by means of the spectrophometric method. Good agreement of the results obtained by two different methods was established.
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Original Russian Text © V.M. Krikun, L.P. Sadimenko, E.N. Voloshina, N.A. Voloshin, 2009, published in Zhurnal Obshchei Khimii, 2009, Vol. 79, No. 6, pp. 1019–1024.
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Krikun, V.M., Sadimenko, L.P., Voloshina, E.N. et al. Polarographic and spectrophotometric studies of the spiro[indolin-pyridobenzopyrane] complexes with the heavy metal ions. Russ J Gen Chem 79, 1191–1196 (2009). https://doi.org/10.1134/S1070363209060279
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DOI: https://doi.org/10.1134/S1070363209060279