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New complexanes. XLV. Preparation and study of the complex formation of ethylenediamine-N,N'-bis(carboxymethyl)-N-methylphosphonic acid

P. Butvin, I. Valášková, M. Kotouček, and J. Majer

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

 

Abstract:  The study of various complexanes possessing carboxymethyl and methyl­phosphonic groups is described in a number of papers. A new compound of this type is ethylenediamine-N,N'-bis(carboxymethyl)-N-methylphosphonic acid (EBKMP) prepared by reaction of the Mannich type, and its composition and structure is discussed basing upon the results of elemental analysis, IR, 1H and ,13C NMR spectroscopy. The complex formation of that new agent with series of divalent and trivalent cations was investigated by means of the paper elec­trophoresis. It was found that this ligand forms complexes of [MHL]- and [ML]2- type (rarely of [MH2L]0) with divalent cations, and those of [MHL]0, [ML2]-, and [M(OH)L]2- with the trivalent ones. A procedure for separation of the cation mixture in the presence of ligand in question was worked out.

Full paper in Portable Document Format: 383a341.pdf

 

Chemical Papers 38 (3) 341–349 (1984)

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