Acid-basic properties of 2,2-Bis[(2,4-dihydroxy-3-methyl-aryl)ethyl]methylamine and its interaction with Cu(II)
作者:Yu. I. Sal’nikov、G. A. Boos、I. S. Ryzhkina、A. R. Burilov、D. N. Manzhukova
DOI:10.1134/s1070328407070068
日期:2007.7
The acid-basic and complexing properties of the novel compound 2,2-bis[(2,4-dihydroxy-3-methyl-aryl)ethyl]methylamine (H4L) in an aqueous isopropyl alcohol (80 vol % (CH3)(2)CHOH) were characterized by pH metric titration (T = 25 +/- 0.1 degrees C) and mathematical simulation of equilibria. The compound forms associates (dimers and tetramers) in the medium under study. The monomeric deprotonated species are accumulated only in a strongly alkaline medium. In an aqueous alcohol, the H4L ligand forms with Cu(II) eight mononuclear complexes, where it can be coordinated through the amino and hydroxo groups.