N,N′-双(N,N-二羧甲氨基)乙二胺的合成和性质
来源期刊：中南大学学报(自然科学版)1997年第1期
论文作者：易清风 陈启元
文章页码：98 - 101
关键词：胺酸;电位滴定;Cu2＋;配合物
Key words：amino acid;potentiometric titration;Cu ion;coordination compound
摘 要：合成了一种新的多元氨羧酸化合物：N，N′－双(N，N－二羧甲氨基)乙二胺(简称BDED)，在元素分析、红外光谱、质谱、电子光谱及pH电位滴定的基础上讨论了它的性质.用BJErrum法求出它的各级离解常数的对数分别为：lgKa1＝－2.92，lgKa2＝－3.51，lgKa3＝－6.57，lgKa4＝－7.45，并进行了直接代数近似计算，最后进行了Cu2+－BDED水溶液体系的电位滴定研究.
Abstract: A new polyaminocarboxylic acid (BDED) was synthesized and characterized on the basis of elemental analysis, IR, MS, electron spectra and pH potentiometric procedures. According to Bjerrum method, dissociation constants of BDED were determined to be lgKa1=-2 92, lgKa2=-3 51, lgKa3=-6 57, and lgKa4=-7 45. And a direct algebraic method was also used to calculate the dissociation constants. The systems of Cu2+ BDED agueous solution were investigated by potentiometer titration.
