ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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)