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Citation: Gao Enjun, Sun Yuzhen, Liu Qitao. Studies of the Stabilities of Lead(Ⅱ) Mixed Ligand Complexes Containing Oxygen and Nitrogen as Coordination Atom Ⅳ. Lead(Ⅱ)-Nitrogen Heterocycles-Malonate System[J]. Chinese Journal of Applied Chemistry, ;1998, 15(2): 94-96. shu

Studies of the Stabilities of Lead(Ⅱ) Mixed Ligand Complexes Containing Oxygen and Nitrogen as Coordination Atom Ⅳ. Lead(Ⅱ)-Nitrogen Heterocycles-Malonate System

1.
Research Section of Coordination Chemistry, Center of Analysis and Test, Shenyang Institute of Chemical Engineering, Shenyang 110021;
2.
Department of Chemistry, Liaoning University, Shenyang 110021

Received Date: 16 June 1997
Revised Date: 6 November 1997

The stability constants (logK_PbLA^Pb) of the mixed ligand complexes, PbLA[L=2,2'-bipyridyl(bipy)、1,10-phenanthroline(phen)、5-nitro-1,10-phenanthroline(Nphe), A=malonic acid(mal^2-)、benzyl malonic acid(pmal^2-)、phenylethylmalonic acid radicals(pmal^2-)] have been determined at 25 ℃ in 10% ethanol with ionic strength I=0.1(KNO₃) mol/L by potentrometric titration. It is found that the △logK、logX values of the mixed ligand complexes are obviously higher than the △logK(s)、logX(s). The stability caused by the complexes has been discussed.
- bipyridyl,
- phenanthroline,
- nitrophenanthroline,
- phenylalkyl malonate,
- lead(Ⅱ) mixed complex,
- stability
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