Kinetics and mechanism of the complexation reaction of copper(II) with diazadioximes
作者:Yun-Ming Wang、Chung-Sun Chung、Jem-Mau Lo、Ya-Ling Wu
DOI:10.1016/s0277-5387(99)00087-x
日期:1999.5
formation of their copper(II) complexes and the deprotonation reactions at the two oxime sites of these complexes have been investigated quantitatively by the potentiometric technique and by the measurement of their electronic spectra. The kinetics of complexation obtained by using the stopped-flow technique indicate that the first copper(II)–amino nitrogen bond formation between copper(II) and the unprotonated
四个重氮二肟,3,3,8,8-四甲基-4,7-二氮杂十二烷-2,9-二酮二肟(L 1),3,3,9,9-四甲基-4,8-二氮杂十二烷-的质子化常数2,10-二酮二肟(L 2),3,3,6,6,9,9-六甲基-4,8-二氮杂十一烷-2,10-二酮二肟(L 3)和3,3,10,10 -四甲基-4,9-二氮十二烷-2,11-二酮二肟(L 4)已在0.10 mol dm -3 NaClO 4中进行了电位测定。在25.0±0.1°C下。通过电位测定技术和电子光谱的测量,定量研究了它们的铜(II)配合物的形成以及在这些配合物的两个肟位点处的去质子反应。使用停止流技术获得的络合动力学表明,铜(II)和未质子化的配体之间形成的第一个铜(II)-氨基氮键是决定速率的步骤,质子损失是限制速率的步骤。铜(II)与单质子化的配体反应的步骤 结合空间,感应和环应变效应,讨论了热力学,光谱和动力学数据。