苯乙基丙二酸的合成及其电离常数研究  

Synthesis of Phenethylmalonic Acid and Studies of the Ionization Constant

作　　者：孙玉珍[1,2] 徐大军[1,2] 石中亮[1,2] 高恩君[1,2] 王岩[1,2] 郑彩琴[1,2] 

机构地区：[1]沈阳化工学院分析测试中心 [2]沈阳化工学院配位化学研究室

出　　处：《沈阳化工学院学报》1997年第3期182-187,共6页Journal of Shenyang Institute of Chemical Technolgy

基　　金：沈阳市科委基金

摘　　要：合成了苯乙基丙二酸．经红外光谱、元素色谱、熔点测定等分析手段对合成产物进行了表征．用ｐＨ－电位滴定法测定了该配体在二烷／水混合介质中（Ｖ／Ｖ％）以ＫＮＯ３为支持电解质及离子强度Ｉ＝０．１０ｍｏｌ·ｄｍ－３条件下的一、二级电离常数，并与相似的丙二酸电离常数进行了比较．结果表明：随着溶剂中二烷比例的增大，苯乙基丙二酸和丙二酸的各级电离常数ｐＫ值亦成比例增大，符合线性变化规律．Phenethylmalonic acid is synthesized.The title product is characterized by means of IR,elemental analysis and melting point determination.Ionization constants (first and second)of the ligand are determinated by using pH potentionmetric titration under dioxane/water mixed medium( V/V %),the potassium nitrate as supporting electrolyte and ionic strength I =0.10 mol\5dm -3 .It was compared with the ionization constant of malonic acid.The results showed:when the proportion of the dioxane in solvent increased,the ionization constants of phenethylmalonic acid and malonic acid proportionally are increased.The linear regularity exists in their changes.

关 键 词：苯乙基丙二酸 电离常数 丙二酸 

分 类 号：TQ225.143[化学工程—有机化工] O657.91[理学—分析化学]