THE AFFINITY OF LEAD(II) FOR NITROGEN-DONOR LIGANDS
- 3 January 1977
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 6 (3) , 163-166
- https://doi.org/10.1080/00958977708079904
Abstract
The following formation constants are reported for lead(II) with imidazole (lm) at 25°C in 0.5 M 1mHNO3: log K 1 1.10 ± 0.04, log K 2 0.99 ± 0.04. The pK a of 1m in 0.5 M ImHNO3 at 25°C is 6.972 ± 0.003. log K 1 for tead(II) with Im is fairly close to log K 1 (NH3) 1.6 for lead(II) predicted using a model of the chelate effect based on the asymmetry of the standard state. Since log K 1 (lm) and log K 1 (NH3) for any one metalion are invariably close together, the agreement in log K 1 for the lead(II) Im and NH3 complexes indicates that the model can be used to estimate the formation constants of complexes that cannot exist in water because of hydrolysis.Keywords
This publication has 10 references indexed in Scilit:
- Softness of some metal ionsJournal of Inorganic and Nuclear Chemistry, 1975
- 2,2'-Bipyridine Complexes. I. Polarized Crystal Spectra of Tris (2,2'-bipyridine)copper(II), -nickel(II), -cobalt(II), -iron(II), and -ruthenium(II)Inorganic Chemistry, 1966
- 594. Ion-association constants of some acetates by pH (glass electrode) measurementsJournal of the Chemical Society, 1964
- THE NEPHELAUXETIC SERIESPublished by Elsevier ,1962
- Polarography of Lead and Cadmium Complexes with Tetraethylenepentamine and Pentaethylenehexamine.Acta Chemica Scandinavica, 1962
- Komplexone XXVI. Über die Koordinationstendenz von N‐substituierten IminodiessigsäurenHelvetica Chimica Acta, 1955
- A Proposed Approach to the Chelate Effect1Journal of the American Chemical Society, 1954
- Komplexone XXV. Die polarographische Untersuchung von Austauschgleichgewichten. Neue Daten der Bildungskonstanten von Metallkomplexen der Äthylendiamin‐tetraessigsäure und der 1,2‐Diaminocyclohexan‐tetraessigsäureHelvetica Chimica Acta, 1954
- Komplexone XIX. Die Bildungskonstanten von Schwer‐metallkomplexen der Nitrilo‐triessigsäureHelvetica Chimica Acta, 1951
- Electrolytes in solutions of amino acids. Part II.—The cupric complexes of glycine, alanine and glycyl-glycineTransactions of the Faraday Society, 1951