Steric effects in the complexation kinetics of cyclic and open-chain polyamines with copper(II) in basic aqueous media
Steric effects in the complexation kinetics of cyclic and open-chain polyamines with copper(II) in basic aqueous media
复制标题
碱性水介质中环状和开链多胺与铜 (II) 络合动力学的空间效应
DOI：
10.1021/ic50146a040
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发表时间：
1975
影响因子：
4.6
通讯作者：
D. W. Margerum
中科院分区：
文献类型：
--
作者：
Chin;D. Rorabacher;G. Cayley;D. W. Margerum
最近证明，遇到质子化多胺配位体的静电距离参数不同的前体外层复合物中的反应中心之间的最接近的距离。[7] Kaden没有考虑到质子化环状配体相对于相应开链物种表现出的这种静电效应的放大。很明显，环状结构的限制减小了配体上质子化位点与接近未质子化供体原子的金属离子之间的距离。
As recently demonstrated, the electrostatic distance parameters encountered with protonated polyamine ligands differ from the distance of closest approach between the reactive centers in the precursor outer-sphere complex. 7 Kaden failed to consider the magnification in such electrostatic effects exhibited in protonated cyclic ligands relative to corresponding open-chain species. It is apparent that the constraints of a cyclic structure decrease the distance betweenthe protonated site (s) on the ligand and a metal ion approaching an un-protonated donor atom.