ATTENTION has recently been directed to parallelisms in the order of the stability constants of the complexes formed by bivalent metal ions with different ligands1,2. We have investigated the stability constants of the complexes formed by metal ions with β,β',β"-triaminotriethylamine, N(CH2CH2NH2)3, (tren), which can provide four ligand atoms for a given ion, as previously shown by Mann and Pope3, who prepared complexes of this tetramine with several bivalent ions. The stability constants have been evaluated by combining the acidity constants of the acid (trenH3)3+ with the equilibrium constants of the reaction :
最近人们的注意力集中在二价
金属离子与不同
配体形成的络合物的稳定常数顺序上的平行性1,2。我们研究了
金属离子与β,β',β"-三
氨基
三乙胺, N(CH2CH2NH2)3, (tren) 形成的络合物的稳定常数,它可以为给定离子提供四个
配体原子,如 Mann 先前所示Pope3 制备了这种四胺与几种二价离子的络合物。通过将酸 (trenH3)3+ 的酸度常数与反应的平衡常数相结合来评估稳定性常数: