Electrochemical synthesis of cobalt(II) and cobalt(III) complexes of Schiff bases: The crystal structure of tris{2-[(2-methylphenyl)iminomethyl] pyrrolato}cobalt(III)
摘要:
The electrochemical oxidation of anodic cobalt in an acetonitrile solution of Schiff bases (HL) derived from H-pyrrole-2-carbaldehyde and substituted anilines gives solutions from which [CoL3] complexes were obtained. When 1,10-phenanthroline (phen) or 2,2'-bipyridine (bipy) was added to the electrolytic phase, [CoL2 phen] or [CoL2 bipy] are obtained. The crystal structure of tris{2-[(2-methylphenyl)iminomethyl]pyrrolato} cobalt(III) has been determined by X-ray diffraction. The crystal structure consists of monomeric molecules in which the central CoN6 unit has a slightly distorted octahedral geometry. The electronic, IR and H-1 NMR spectra of the complexes are discussed and related to the structure.