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用pH滴定法研究了在0.1MNaClO_4水溶液中(30.0±0.1℃)Cu(II)-邻羟基苄胺(HBA)和Cu(II)-L(L为乙二胺En,联呲啶DiPY,氨基乙酸Gly,丙二酸Mal,草酸Ox)与HBA的配位反应.测得了Cu(II)-HBA配合物稳定常数(logK_1=9.46,logK_2=7.21)和配位反应平衡常数logk_2[En(7.88),Dipy(9.09),Gly(8.23),Mal(8.48),Ox(8.24)].计算了△logK[△logK=logk_2-logK_1(HBA)]和歧化反应的平衡常数logX.所有混合型配合物的稳定性都比单纯配位统计效应所预期的稳定性要大(即logX>0.6).讨论了pH滴定曲线和几种影响混合型配合物稳定性的因素.
The effects of Cu (II) -hydroxybenzylamine (HBA) and Cu (II) -L (L is ethylenediamine En, bipyridyl DiPY, amino The complexation constant of Cu (II) -HBA complex (log K 1 = 9.46, log K 2 = 7.21) and the equilibrium constant logk 2 [En (7.88 ), Dipy (9.09), Gly (8.23), Mal (8.48), Ox (8.24)]. The equilibrium constants logX of the disproportionation reaction were calculated for all logistic mixtures The stability of the material is greater than the expected stability of the simple coordination statistical effect (ie, logX> 0.6). The pH titration curve and several factors that affect the stability of the mixed complex are discussed.