Arylacylhydrazones of 2,3-dihydroxybenzaldehyde are appropriate ligands for the preparation of heterodinuclear triple-stranded helicates involving high coordinated lanthanide(III) ions. In the present study, three different kinds of substituents are introduced at the ligands in order to modify the organic periphery of the coordination compounds: (1) alkoxy groups are attached to the terminal phenyl groups, (2) NH protons of the hydrazones are substituted by phenyl moieties and (3) amino acid bearing units are attached to the terminus of the ligand. The new ligands nicely form the desired triple-stranded gallium(III)-lanthanum(III) complexes [(5a-c,7,12,15)3GaLa] of which the highly phenylated derivative was crystallized and studied by X-ray diffraction.
2,3-二羟基苯醛的芳基酰
肼是制备涉及高配位
铈(III)离子的异核双
金属三重螺旋体的合适
配体。在本研究中,引入了三种不同类型的取代基,以修饰配合化合物的有机外围:(1)烷氧基团连接到末端苯基;(2)
肼素的NH质子被苯基取代;(3)含有
氨基酸的基团连接到
配体的末端。这些新
配体很好地形成了所需的三重螺旋
镓(III)-
镧(III)复合物[(5a-c,7,12,15)3GaLa],其中高芳香化的衍
生物被结晶并通过X射线衍射进行研究。