The condensation of 2-hydroxybenzaldehyde or 2,4-dihydroxybenzaldehyde with 4,4′-diaminobiphenyl in absolute EtOH in a molar ratio 2:1 gave, respectively, the Schiff base ligands H2L1 or H2L2. The bases served as tetradentate ligands to coordinate CoII, NiII and CdII chlorides, leading to complexes where the metal:ligand ratio is 2:1. All of the compounds were characterized by elemental analysis, infrared, electronic and mass spectroscopy, 1H-n.m.r. and d.s.c. The cyclic voltammograms of the ligands and their complexes in DMF are discussed.
                                    2-羟基
苯甲醛或
2,4-二羟基苯甲醛与4,4′-二
氨基
联苯在无
水乙醇中以2:1的摩尔比缩合,分别得到Schiff碱
配体H2L1或H2
L2。这些
配体作为四齿
配体与CoII、NiII和CdII
氯化物协调,形成
金属:
配体比为2:1的络合物。所有化合物均通过元素分析、红外光谱、电子光谱、质谱、1H-n.m.r.和d.s.c.进行了表征。讨论了这些
配体及其络合物在
DMF中的循环伏安图。