Metallosupramolecular Chemistry of AgI Complexes with Azobis(2-pyridine) and its Derivatives
摘要:
三种偶氮双(2-吡啶)与银盐的反应生成了一维配位聚合物,其结构已通过单晶 X 射线晶体学确定。偶氮二(2-吡啶)始终作为二端配体,在相距 5.49 至 5.82 Å 的银原子之间架桥。其中两种配位聚合物由连续桥接配体正交定向的链组成。另一种聚合物的结构要复杂得多,这是因为三氟乙酸对位离子的参与更为密切,它们也充当了银中心之间的桥梁。
Spectral and Electrochemical Properties of the Diastereoisomeric Forms of Azobis(2-pyridine)-Bridged Diruthenium Species
作者:Laurence S. Kelso、David A. Reitsma、F. Richard Keene
DOI:10.1021/ic9600893
日期:1996.1.1
A series of dinuclear complexes of ruthenium(II) have been synthesized in which alpha-azodiimines such as azobis-(2-pyridine), apy, and azobis(4-methyl-2-pyridine), mapy} act as the bridge and 2,2'-bipyridine (bpy) or 4,4'-dimethyl-2,2'-bipyridine (Me(2)bpy) as the terminal ligands. The diastereoisomeric forms of each species Delta Lambda (meso) and Delta Delta/Lambda Lambda (rac)} have been separated by cation-exchange chromatography and characterized by H-1-NMR spectroscopy. Electronic spectral and electrochemical studies show then to be differences in inter-metal communication between the diastereoisomeric forms in each case. Comparison of the spectroelectrochemical behavior of the range of complexes has allowed unequivocal assignment of the site of the successive reduction processes observed in dinuclear complexes of this type.