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Protonation constants and overall constants of complex-formation of copper(II) ions with surface-active ligands derived from ethylenediamine

P. Butvin, M. Skoumal, Z. Rádl, V. Peterka, and J. Majer

Department of Analytical Chemistry, Faculty of Pharmacy, Comenius University, CS-832 32 Bratislava


Abstract: The protolytic and complex-forming equilibria of the chelates of N-substituted ethylenediamine ligands with the central Cu(II) ions were studied, and their capability of formation of the pseudomicellar phase in aqueous solutions as well. The work was predominantly directed to the assessment of possible application for the micellar catalysis enhanced in its action by metal chelates. It was found that substitution on the ethylenediamine nitrogen atoms with longer aliphatic chains (C4 and C8) substantially increases the number of catalytically active particles in solution of a chelate with Cu(II). The formation of pseudomicellar phase, however, brings about to some extent the formation of catalytically inactive dimeric particles.

Full paper in Portable Document Format: 424a475.pdf


Chemical Papers 42 (4) 475–482 (1988)

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