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

Influence of Ligand Concentration and Reaction Medium on Protonation Constants and Stability Constants of Nickel(ll) and Copper(ll) Benzo[h]naphthyridine Complexes

A. Gaudyn and W. Sliwa

Institute of Chemistry, Pedagogical University, PL-42-201 Czestochowa

Abstract: Using the potentiometric method the influence of ligand concentration and reaction medium on the stability constants of Ni(II) and Cu(II) complexes of 1,6- and 4,6-benzo[h]naphthyridines and on their compositions was examined, as well as the influence of the reaction medium on protonation constants for these ligands.In experiments water-alcohol solutions (φ_r - V(H₂O):V(alcohol) = 2:3) have been applied. The protonation and stability constant values obtained in water-alcohol systems were compared with those determined in aqueous solution. Measurements were carried out at the constant ionic strength /(KNO₃) = 0.1 mol dm^-3 and 25° C.

Full paper in Portable Document Format: 485a306.pdf

Chemical Papers 48 (5) 306–309 (1994)