stability constants have been measured. The reactivity of the dinuclear species [Cu(2)LH(-1)] towards phosphate ester hydrolysis have shown that the OH-functionality incorporated in some of the ligands does not enhance the hydrolysis rate. Several ligands were reacted with Pt(2+) to give insoluble dinuclear species [Pt(2)LI(3)]. One of them was studied by X-ray diffraction and shows that the two Pt(2+) are
合成了一系列
吡唑和三唑基双核
配体,并研究了它们对
金属离子的络合潜力,并显示出方形的平面配位几何形状。在Cu(2+)的情况下,已使用pH滴定法确定了溶液中的络合平衡。已检测到
化学计量比为1:1的物种[CuLH(n)],
化学计量比为2:1的物种[Cu(2)LH(m)],并且具有二聚体性质的物种[Cu(2)L(2)H(p)]。并测量了它们的整体稳定性常数。双核物质[Cu(2)LH(-1)]对
磷酸酯
水解的反应活性表明,掺入某些
配体中的OH-官能度不会提高
水解速率。几个
配体与Pt(2+)反应,生成不溶性双核物质[Pt(2)LI(3)]。其中一个通过X射线衍射进行了研究,结果表明两个Pt(2+)被
吡唑基和一个I(-)桥接。其余两个位置被杂环的α位和末端I(-)的
氨基占据。几乎是平面的[Pt(2)LI(3)]单元在晶体中形成薄片,相隔约4 A,因此指示pi堆积相互作用。