摘要
用ｐＨ电位滴定法测定了含１，１０－邻菲咯啉（Ｐｈｅｎ）和羧酸（ＣＡ）配体的三元混配配合物Ｐｄ（Ｐｈｅｎ）（ＣＡ）＋体系的稳定常数，比较和讨论了各种三元混配物之间的稳定性差异。实验结果表明：在三元混配物Ｐｄ（Ｐｈｅｎ）（ＰＣＡ）＋中（ＰＣＡ，苯基羧酸）存在分子内芳环堆积作用，堆积程度依赖于苯基和配位的羧酸根之间的亚甲基数目，最适宜堆积的苯基羧酸是２－苯乙酸和３－苯丙酸。
The stability constants of the binary complexes Pd(CA)￣+ and the ternary complexes Pd(Phen)(CA)￣+ have been determined by potentiometric pH titration.The stability difference among the ternary mixed-ligand complexes has been discussed.The experimental results indicate the existence of intramolecular aromatic ring stacking interactions in the ternary mixed-ligand complexes Pd (Phen)(PheCA)￣+.The extent of stacking depends on the number of methylene groups between the phenyl moiety and the coordinated carboxylate groups.The best fit stacking is reached with 2-phenylacetate and 3-phenylpropionate.
出处
《应用化学》
CAS
CSCD
北大核心
1996年第1期47-49,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
钯
配合物
芳环堆积
稳定常数
邻菲咯啉
羧酸
palladium(Ⅱ),mixed-ligand complex,aromatic ring stacking,stability constant
