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Citation: GAO En-Jun, LIU Qi-Tao. Electronic Effect of Ligand Substituents in Ternary Complexes Thermodynamical Study of Zn²⁺, Cd²⁺-bipy(phen)-Salicylic Acid(3, 5-Dinitrosalicylic Acid) Systems[J]. Chinese Journal of Applied Chemistry, ;2000, 17(1): 43-46. shu

Electronic Effect of Ligand Substituents in Ternary Complexes Thermodynamical Study of Zn²⁺, Cd²⁺-bipy(phen)-Salicylic Acid(3, 5-Dinitrosalicylic Acid) Systems

GAO En-Jun ¹ ,
LIU Qi-Tao ²

1.
1. Laboratory of Coordination Chem istry, Shenyang Institute of Chem ical Technology, Shenyang 110021;
2.
2. Department of Chemistry, Liaoning University, Shenyang

Received Date: 28 June 1999
Available Online: 26 October 1999
Fund Project: 辽宁省自然科学基金资助课题(110064) (110064)

The stability constants lg K of the ternary Zn²⁺, Cd²⁺ complexes of the M (A) (B) and their corresponding constants Δlg K and lg X have been determined by po tentiometric titration(I=0.1 mol/L KNO₃)at 15, 25, 35, and 45℃, respectively, where lig and A is 2, 2'-bipyridyl(bipy), 1, 10-phenanthroline(phen); ligand B is salicylic acid(sali), 3, 5-dinitrosalicylic acid(dini). The thermody namic function changes ΔG, ΔH and ΔS of the coordination reactions were obtained from Van't Hoff equation and thermody namic relations. Comparison of the values of Δlg K, lg X with corresponding statistical values Δlg K (S)and lg X (S)shows that the stability of the ternary complex containing sali is enhanced, but this enhacement is greatly weakened for the ternary com plexes containing dini because of the effect from nitro groups.
- ternary complex,
- substituent,
- electronic effect,
- thermodynamics
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Electronic Effect of Ligand Substituents in Ternary Complexes Thermodynamical Study of Zn2+, Cd2+-bipy(phen)-Salicylic Acid(3, 5-Dinitrosalicylic Acid) Systems

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Electronic Effect of Ligand Substituents in Ternary Complexes Thermodynamical Study of Zn²⁺, Cd²⁺-bipy(phen)-Salicylic Acid(3, 5-Dinitrosalicylic Acid) Systems