Abstract The reaction of NiCl2·6H2O with one equivalent hemilabile diaminodiamide ligandN,N′-bis(β-carbamoylethyl)1,2-diaminocyclohexane (1) gave a pale blue compound [Ni(C12H24N4O2)(H2O)2]2·3H2O·4Cl (2). With more than one equivalent ligands, 2 was transformed to a yellow species [Ni(C12H22N4O2)]·3H2O (3) by the Ni–O to Ni–N bond rearrangement at two amide sites of the complex. The color change could
The reaction of CuCl 2 ·2H 2 O with one equivalent hemilabile diaminodiamide ligandN,N′-bis(β-carbamoylethyl)trans-1,2-diaminocyclohexane ( 1 ) gave a blue compound [Cu(C 12 H 24 N 4 O 2 )Cl]Cl·H 2 O ( 2 ). With more than one equivalent ligands, 2 was transformed to a purple species [Cu(C 12 H 22 N 4 O 2 )]·3H 2 O ( 3 ) by the Cu―O to Cu―N bond rearrangement at two amide sites of the complex. Compounds
CuCl 2 ·2H 2 O 与一当量半稳定性二氨基二酰胺配体 N,N'-双(β-氨基甲酰基乙基)反-1,2-二氨基环己烷 (1) 反应得到蓝色化合物 [Cu(C 12 H 24 N 4 O 2 )Cl]Cl·H 2 O ( 2 )。使用多个等价配体,通过在两个酰胺位点的 Cu-O 到 Cu-N 键重排,2 转化为紫色物质 [Cu(C 12 H 22 N 4 O 2 )]·3H 2 O ( 3 )复杂的。化合物 2 和 3 可根据水溶液中的 Cu(II)/1 比率进行结构转换。2和3的结构通过单晶X射线衍射分析表征。2 的结构数据表明铜原子采用五配位的 N 2 O 2 Cl 环境并给出方形锥体几何形状。3的结构表明铜原子采用四配位的N 4 环境,给出扭曲的方形平面几何。颜色变化可以描述为配体的 pH 依赖性异构化。所呈现的结果可用于设计新的基于铜(II)的开关材料。