The Chelate Effect Studied by Calorimetry, Potentiometry, and Electron Spin Resonance
The Chelate Effect Studied by Calorimetry, Potentiometry, and Electron Spin Resonance
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DOI：
10.1021/ic50005a019
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发表时间：
1963-02
影响因子：
4.6
通讯作者：
G. Atkinson;J. E. Bauman
中科院分区：
文献类型：
--
作者：
G. Atkinson;J. E. Bauman
用量热法和电位法研究了2，2 ′-联吡啶和吡啶与Mn（Ⅱ）、Ni（Ⅱ）、Cu（Ⅱ）和Zn（Ⅱ）配合物的螯合热力学。吡啶的螯合稳定性与乙二胺络合物的螯合稳定性的顺序相同。的焓和熵的贡献的螯合作用进行了分析，前者是显着的Cu（II）和Ni（II）离子。螯合作用进一步分为梯度和单一部分。说明了用电子自旋共振作为研究复杂稳定性的工具的可能性。esr测量结果与传统测量结果吻合较好。
The thermodynamics of chelation of complexes of 2, 2'-bipyridme and pyridine with Mn (II), Ni (II), Cu (II), and Zn (II) were studied by calorimetry and potentiometry. The chelate stabilization for pyridine is of the same order as that for ethylenediamine complexes. The enthalpy and entropy contributions to the chelate effect are analyzed, the former being significant for the Cu (II) and Ni (II) ions. The chelate effect is further divided into cratic and unitary portions. Possi-bilities of using electron spin resonance as a tool in studying complex stabilities are illustrated. Good agreement is ob-tained between esr and traditional measurements.