Synthesis and properties of cobalt (III) complexes of tripodal ligands containing amide functional groups

摘要

Two new, trigonally symmetrical, triamide tripodal ligands and their complexes with the cobalt (III) ion, [1, 1, 1-tris(4-amino-1-oxo-2-azabutyl) ethanato] cobalt (III) trihydrate 1 and [1, 1, 1-tris(4-amino-methyl-3-oxo-2-azabutyl) ethanato] cobalt (III)-water-ethanol (1/8/0.5) 2 have been prepared. The hexadentate structures of the neutral, trigonal, triamido complexes have been established by an X-ray study of 1 and ~(13)C NMR spectrometry of both molecules. The chemical, spectroscopic and electrochemical properties of the complexes have been investigated as well as those of the monoamido tripodal complex [1, 9-diamino-5-(4-amino-2-azabutyl)-5-ethoxycarbonyl-4-oxo-3, 7-diazanonanato] cobalt (III) chloride.