N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the li...N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.展开更多
Molecular structure of PdH2 and YH2 and their thermodynamic functions(H,S,G) at different temperature had been calculated using density functional theory B3LYP method,and the standard formed thermodynamic functions(Δ...Molecular structure of PdH2 and YH2 and their thermodynamic functions(H,S,G) at different temperature had been calculated using density functional theory B3LYP method,and the standard formed thermodynamic functions(ΔH°,ΔS°,ΔG°) for PdH2 and YH2 molecules had also been calculated by thermodynamic method.The results showed that PdH2 and YH2 molecules have thermodynamic stability below 598 K and 698 K,respeetively.展开更多
文摘N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.
文摘Molecular structure of PdH2 and YH2 and their thermodynamic functions(H,S,G) at different temperature had been calculated using density functional theory B3LYP method,and the standard formed thermodynamic functions(ΔH°,ΔS°,ΔG°) for PdH2 and YH2 molecules had also been calculated by thermodynamic method.The results showed that PdH2 and YH2 molecules have thermodynamic stability below 598 K and 698 K,respeetively.
