摘要三齿配体2,6-双(甲硫基甲基)吡啶(L)的酸常数及其Pd(II)和Cu(II)配合物[PdLTu] 2+和[CuL(H2O)] 2+的形成常数具有通过电位分光光度法和分光光度法在水溶液中测定。电位计测定的酸度常数为log K = 4.04±0.04(分光光度法为4.01±0.02),而Pd(II)和Cu(II)的形成常数为log K = 28.92±0.09和4.6±0.1(分别为4.41±0.04)。还报道了一些具有相同螯合基团的大孔聚苯乙烯-二乙烯基苯树脂对Pd(II)对Cu(II)的高选择性的初步结果。
摘要三齿配体2,6-双(甲硫基甲基)吡啶(L)的酸常数及其Pd(II)和Cu(II)配合物[PdLTu] 2+和[CuL(H2O)] 2+的形成常数具有通过电位分光光度法和分光光度法在水溶液中测定。电位计测定的酸度常数为log K = 4.04±0.04(分光光度法为4.01±0.02),而Pd(II)和Cu(II)的形成常数为log K = 28.92±0.09和4.6±0.1(分别为4.41±0.04)。还报道了一些具有相同螯合基团的大孔聚苯乙烯-二乙烯基苯树脂对Pd(II)对Cu(II)的高选择性的初步结果。
Equilibrium and kinetic studies on the displacement of pyridine by chloride ion in pyridine[2,6-bis(methylthiomethyl)pyridine]-palladium(II) perchlorate
Abstract The kinetics and equilibria for the displacement of pyridine from the [Pd(SNS)(py)] 2+ cation (SNS = 2,6-bis(methylthiomethyl)pyridine) by water and chloride ion have been studied in acid and basic aqueous solutions. The role of the SNS ligand in bis-cationic complexes of Pd(II) has been discussed in terms of its π back-bonding properties versus tridentate sp 3 nitrogen donors (NNN). The kinetics