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Title: Metal ion interactions with penicillins: Part VI-Equilibrium study on the mixed-ligand complex formation of cobalt/H), nickel(II), copper(II) and zinc(II) with 6-aminopenicillanic acid as the primary ligand and bipyridine, glycinate and imidazole as secondary ligands
Authors: Mukherjee, G N
Ghosh, T K
Issue Date: Sep-1994
Publisher: NISCAIR-CSIR, India
Abstract: Equilibrium study on the complex formation of M2+ ions (where M = Co, Ni, Cu and Zn) with 6-aminopenicillanic acid (apaH±) in the presence of typical ligands, viz., bipyridine, glycinate and imidazole (B) in aqueous solution at 37ᵒC and ionic strength I = 0.1 M NaNO3 has indicated the formation of mixed-ligand complexes of the types M(apa)(B), M(apa)(B)(OH) and M(apa)(B)(OH)2 in addition to the binary M(B) and M(apa) complexes. The orders of stability constants, viz. Cu2+ > Ni2+ > Co2+ > Zn2+ with regard to the metal ions and bipyridine > glycinate > imidazole with regard to secondary ligands have been correlated with the electronic structures of M2+ ions, modes of bonding of the ligands and the nature of the metal-ligand bonds.
Page(s): 869-871
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.33A(09) [September 1994]

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