Conductometric and Spectrophotometric Studies of the , Ni2+, Zn2+, Cd2+ and Co2+ Thermodynamics Complexation of Cu2+, Hg2+ Ions with (E)-(Pyridine -2-Ylmethylidene)({2-(E)-(Pyridine-2- Ylmethylidene)Amino]ethyl} Ligands in Acetonitrile Solution and Comparison of Their Behaviors
محل انتشار: دوفصلنامه ایرانی شیمی تجزیه، دوره: 4، شماره: 1
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 390
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شناسه ملی سند علمی:
JR_IJAC-4-1_002
تاریخ نمایه سازی: 6 شهریور 1396
چکیده مقاله:
A new pyridine derivative ligand, (E)-(Pyridine-2-ylmethylidene)({2-(E)-(Pyridine-2-ylmethylidene)amino]ethyl}has been synthesized and kf value of its complexes with Cu2+, Ni2+, Cd2+, Zn2+, Hg2+ and Co2+has been determined by spectrophotometric and conductometric methods in acetonitrile at various temperatures. The formation constants (Kß = K1 × K2) of the 1:1 and 1:2 (metal ion to ligand) complexes were calculated by computer fitting of the absorbance-mole ratio data, and molar conductance-mole ratio data at different temperatures, and found that complexes to vary in acetonitrile solvent in the order of Cu2+ > Hg2+> Zn2+> Co2+> Cd2+> Ni2+> Ag+. The enthalpy and entropy changes of the complexation reaction were evaluated from the temperature dependence of formation constants.
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نویسندگان
Mahmood Payehghadr
Department of Chemistry, Payame Noor University (PNU), P.O. BOX, ۱۹۳۹۵-۳۶۹۷, Tehran, Iran
Homa Shafieekhani
Department of Chemistry, Payame Noor University (PNU), P.O. BOX, ۱۹۳۹۵-۳۶۹۷, Tehran, Iran
Ali Morsali
Faculty of Chemistry, Tarbiat Modarres University, Tehran, Iran