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

New complexone. XI. Complex-forming properties of β-hydroxyethyliminomonopropione-α-monoacetic acid and of N,N-bis(hydroxyethyl)-α-alanine

J. Majer and E. Riečanská

Komensky Univ., Bratislava

Abstract: Two new complexing agents of the monoamine type, N-(carboxymethyl)-N-(β-hydroxyethyl)alanine (I) and N,N-bis(hydroxyethyl)alanine (II) were prepd. The dissocn. consts. of I and II and the stability consts. of their chelates with the cations Mg²⁺, Ca²⁺, Cd²⁺, Co²⁺, Zn²⁺, Ni²⁺, Pb²⁺, and Cu²⁺ at 20° and at ionic strength 0.1 (KNO₃) were detd. The molar ratios of the complexing agent to the cation were 1:1 and 2:1. The stability consts. were calcd. by a direct algebraic method (1:1) and also by a modified graphical Bjerrum method (1:1 and 2:1). The effect of the Me group on the CO₂H group was compared with that for (β-hydroxyethylimino)diacetic acid and N,N-bis(hydroxyethyl)glycine.

Full paper in Portable Document Format: 221a15.pdf (in Slovak)

Chemical Papers 22 (1) 15–24 (1968)