caa a22 4500 469038047 CHVBK 20180323132801.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00808273 doi (NATIONALLICENCE)springer-10.1007/BF00808273 Azab H. Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt aut Polarographic study of composition and stability constants of Pb(II) N-(2-acetamido) imino diacetate complexes [Elektronische Daten] [H. Azab] Polarographische Untersuchung von Zusammensetzung und Stabilitätskonstanten von Pb(II) N-(2-Acetamido)iminodiacetat-Komplexen Summary: The complexation of Pb(II) by N-(2-acetamido) imino diacetate (ADA) has been studied polarographically (dc and ac polarographic techniques). Ac polarographic studies have been particularly helpful in deciding the reversibility of the reduction of both simple and complexed metal ions and for confirmation of the overall stability constants. A weighted least squares numerical technique has been applied for the calculation of the overall stability constants using both dc and ac techniques. The reduction of Pb(II) in N-(2-acetamido) iminodiacetate solutions has been found to be reversible and diffusion controlled, involving a two electron transfer process. Potential vs. concentration data at μ=0.1 mol dm−3 (KNO3) are interpreted on the basis of the formation of two complex species PbADA and Pb(ADA)2− in thepH range 6.85-8.50. The logarithms of the stability constants (calculated from ac measurements) of these complexes are 8.73±0.12, 10.86±0.18 at 25°C, 8.31±0.28, 10.31±0.09 at 35°C and 7.61±0.20, 10.10±0.11 at 45°C, respectively. The thermodynamic parameters ΔG, ΔH and ΔS have been calculated at 35°C. Springer-Verlag, 1992 Pb(II) N-(2-acetamido) imino diacetate complexes nationallicence Stability constants nationallicence Polarography nationallicence Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/12(1992-12-01), 1107-1115 0026-9247 123:12<1107 1992 123 706 https://doi.org/10.1007/BF00808273 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00808273 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Azab H. Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/12(1992-12-01), 1107-1115 0026-9247 123:12<1107 1992 123 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer