π–π Stacking, hydrogen bonding and anti-ferromagnetic coupling mechanism on a mononuclear Cu(II) complex
作者:Hong Li、Shi-Guo Zhang、Long-Miao Xie、Li Yu、Jing-Min Shi
DOI:10.1080/00958972.2011.572968
日期:2011.4.20
Weak anti-ferromagnetic coupling is observed in a mononuclear copper(II) complex, [Cu(Pid)(OSO3)(H2O)] · (H2O) (Pid = 2,2′-(1,10-phenanthrolin-2-ylimino)diethanol). The Cu(II) complex is a distorted square pyramid. Analysis of the crystal structure indicates that there are two types of magnetic coupling pathways, where one pathway involves π–π stacking between adjacent complexes and the second one involves
在单核铜 (II) 配合物 [Cu(Pid)(OSO3)(H2O)] · (H2O) (Pid = 2,2'-(1,10-phenanthrolin-2-ylimino) 中观察到弱反铁磁耦合)二乙醇)。Cu(II) 复合物是一个扭曲的方形金字塔。晶体结构分析表明存在两种类型的磁耦合途径,一种途径涉及相邻配合物之间的π-π堆积,第二种途径涉及相邻配合物之间的O-H…O氢键。变温磁化率表明,居里-魏斯常数 θ = -13.71 K = -9.93 cm-1 的相邻 Cu(II) 离子之间存在弱反铁磁耦合。理论计算表明 π-π 堆叠导致反铁磁耦合 2J = -6.30 cm-1,和 O-H...O 氢键通路导致与 2J = -3.38 cm-1 的较弱反铁磁相互作用。理论计算还表明,来自 π-π 堆叠的反铁磁耦合符号符合 McConnell I 自旋极化机制。