Akademik Veri Yönetim Sistemi
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, cilt.42, sa.7, ss.1632-1635, 2003 (SCI-Expanded)
The stability constants for the nickel(H) and copper(H)-alpha-amino acid (glycine, L-alanine, L-valine, L-leucine, L-isoleucine, L-serine, L-phenylalanine and L-methionine) binary complex systems have been studied using pH-measurements in 40% ethanol-60% water mixture. The study shows that at 25degreesC and ionic strength at 0.10 M the following species are present in this solvent mixture: CuHL2+, CuL+, CuL2 for copper(II) complexes and NiL+, NiL2, NiL3- for nickel(II) complexes. The stability of the nickel(H) complexes is lower than that of the copper(II) complexes. The study shows that the tendency of alpha-amino acids to form complexes with metal(II) ions is greater in 40% ethanol-60% water mixture as compared to that in only water.