钴 (II) 和锰 (II) 配合物与 12-、14-、15- 和 18 元 N4、N2O2、N2O2S、N6 供体大环配体的合成、电化学和光谱研究
摘要:
13-, 14-, 15-, and 18-membered N2O2, N-4, N2O2S, and N-6 donor macrocyclic ligands and their complexes with cobalt(II) and manganese( II) of the general composition ML,(NCS)(2) (where M 5 cobalt( II) and manganese( II) and ligands L 5 L 1, L 2, L 3, and L 4 have been synthesized. All of the macrocyclic ligands and their complexes have been characterized by elemental analyses, IR, mass, H-1 NMR, magnetic moments, electronic and EPR spectral studies. The structures of the complexes and the various coordinating groups such as > C=N, > CONH, Ph-O-CH2- and > NH are discussed. The redox properties of the complexes were examined by cyclic voltammetery. They exhibit a high potential Co(III)/Co(II) couple along with ligand reduction.