New binuclear metal chelate complexes of copper(II) chloride and acetate with bis(hetarylhydrazones) obtained by condensation of 2,6-diformyl-4-r-phenols with 2-hydrazinoquinoline
作者:V. V. Lukov、I. E. Gevorkyan、E. V. Dontsova、V. A. Koga、L. D. Popov、V. V. Dykov
DOI:10.1007/s11173-005-0012-7
日期:2005.2
A spectrophotometric study of heteroligand chromium(III) complexes with iminodiacetic (H2Ida), N-methyliminodiacetic (H2Mida), N -(β-hydroxyethyl)iminodiacetic (H2Heida), nitrilotriacetic (H3Nta), ethylenediaminetetraacetic (H4Edta), and citric acids (H4Cit) showed that complexation in ternary systems depends on the concentrations of the reagents and the pH of the medium. The resulting complexes were [Cr(HIda)(H2Cit)], [Cr(HMida)(H2Cit)], [Cr(HHeida)(H2Cit)], [Cr(HHeida)(HCit)]–, [Cr(HNta)(H2Cit)]–, [Cr(HNta)(HCit)]2–, [Cr(Nta)(HCit)]3–, [Cr(HEdta)(HCit)]3–, and [Cr(Edta)(HCit)]4–. The logarithms of their stability constants are 41.97 ±0.47, 43.54 ±0.62, 42.32 ±0.62, 36.34 ±0.26, 43.70 ±0.25, 39.75 ±0.45, 32.93 ±1.56, 46.46 ±0.80, and 41.71 ±0.81 , respectively (I = 0.1 (NaClO 4)).
分光光度法研究了异
配体铬(III)与
亚氨基二乙酸(H2Ida)、N-甲基
亚氨基二乙酸(H2Mida)、N-(β-羟乙基)
亚氨基二乙酸(H2Heida)、
次氮基三乙酸(H3Nta)、
乙二胺四乙酸(H4Edta)和
柠檬酸(H4Cit)的络合物、
乙二胺四乙酸(H4Edta)和
柠檬酸(H4Cit)表明,三元体系中的络合取决于试剂的浓度和介质的 pH 值。它们的稳定常数对数分别为 41.97 ±0.47、43.54 ±0.62、42.32 ±0.62、36.34 ±0.26、43.70 ±0.25、39.75 ±0.45、32.93 ±1.56、46.46 ±0.80、41.71 ±0.81(I = 0.1(NaClO 4))。