Abstract
The carbonyl group of compounds of the phenacyl- and benzoylethyl-pyridinium type is recognized as a potential σ donor ligand which can produce complexes with the aquapentacyanoferrate(II) ion. Its reactive form is the ionized one i.e. the enolate ion. A detailed spectrophotometric investigation has been made for the reaction of the aquapentacyanoferrate(II) ion with 1-benzoylethylpyridinium chloride. The equilibrium constant of the produced complex was derived using two literatury available additional types of processing the molar ratio method’s experimental data which were not found to be applied to this type of complexes. The kinetics of this substitution reaction were studied in buffered solutions at pH = 8.0 and I = 0.05 M. The obtained results are consistent with a dissociative mechanism.
摘要 苯乙酰基和苯甲酰乙基吡啶类化合物的羰基基团被认为是一种潜在的σ供体配体,可以与五氰合铁(II)离子形成配合物。它的反应形式是离子化的烯醇离子。对五氰合铁(II)离子与1-苯甲酰乙基吡啶盐酸盐反应进行了详细的光谱学研究。利用两种文献上可得到的附加型的摩尔比法实验数据处理方法,得出了所产生的配合物的平衡常数,这些方法并未被应用于这类配合物。在pH=8.0和I=0.05 M的缓冲溶液中研究了这种取代反应的动力学。所得结果与解离机理一致。