Studies on Biologically Relevant Binary and Ternary Metal Complexes. IV. Stability of Binary and Ternary Metal Complexes Containing Bis(Imidazol-2-Yl)Methane and Amino Acids

Abstract

Abstract Formation constants for the interaction of bis(imidazol-2-yl) methane (BIM) with Mg(II), Ca(II), Mn(II), Co(II), Ni(II), Zn(II) and Cd(II) are reported at t α 35[ddot]C, u α 0.2M (KNO3). Stability constants for the ternary complexes (MLA) of Co(II), Ni(II), Zn(II) and Cd(II) with BIM as primary ligand (L) and various amino acids, ethylenediamine and pyrocatechol as secondary ligands (A) are also reported under similar experimental conditions. Factors contributing to the stability of the binary and ternary complexes are discussed.