Protolytic And Complex Formation Properties Of 25,26,27,28-Tetrakis[Hydrazinocarbonylmethyloxy]Calix[4]Arene In Water-Dimethylsulfoxide Media

The protolytic and complex formation properties of copper(II) with tetrahydrazide (25,26,27,28-tetrakis[hydrazinocarbonylmethyloxy]calix[4]arene) were studied in water-dimethylsulfoxide media using spectrophotometry, pH-metric titration, and mathematical modeling. The dissociation constants for the protonated forms of the tetrahydrazide and the formation constants for the complexes have been determined. Mono-and polynuclear complexes with molecular and protonated forms of the ligand were observed.