Metal Chelates of Hydrazo-Dimedon Dyes. Chelating Tendencies of 5,5-Dimethylcyclohexane-2-(2-Carboxyphenyl,and 3-Carboxyphenyl)-Hydrazono 1,3-Dione (DC-2-CPHD and DC-3-CPHD) |
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Authors: | Atef A. T. Ramadan Mohammed S. Abdel-Moez Mohammed F. Eid |
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Abstract: | The consecutive stepwise formation constants of 1:1 and 1:2 chelate species formed by the interaction of DC-2-CPHD and DC-3-CPHD anions with tripositive lanthanon and divalent copper, nickel, cobalt, zinc, manganese, and cadmium cations were determined potentiometrically at ionic strengh of 0.1 (KNO3) and 30°C. The results indicate that two different coordination modes, one tridentate (DC-2-CPHD), and one bidentate (DC-3-CPHD), are in evidence. |
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Keywords: | 5,5-Dimethylcyclohexane-2-(2-carboxyphenyl and 3-carboxyphenyl)-hydrazono 1,3-dione protonation and stability constants transition ions lanthanide ions |
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