Direct electrochemical synthesis of cobalt(II) complexes of tosylamides:: crystal structures of [CoL2py2], [CoL2DMF2], [CoL2bipy] and [CoL2phen], L= [(4-methylphenyl)sulfonyl]-2-pyridylamid

Several complexes with tosylamides were synthesised by the electrochemical oxidation of cobalt in an acetonitrile solution of [(4-methylphenyl)sulfonyl]-imino-1 H-pyridine (HL) and the appropriate neutral coligand: L' (pyridine, 2,2'-bipyridine, 1,10-phenanthroline or N,N-dimethylformamide). The structures of bis-(N,N-dimethylformamide)bis{[(4-methylphenyl)sulfonyl]-2-pyridyl-amide}cobalt(II), bis-(pyridine)bis{[(4-methylphenyl)sulfonyl]-2-pyridyl-amide}cobalt(II), 2,2'-bipyridine bis{[(4-methylphenyl)sulfonyl]-2-pyridyl-amide}cobalt(II) and 1,10-phenanthroline bis{[(4-methylphenyl)sulfonyl]-2-pyridyl-amide}cobalt(II) were determined by X-ray diffraction methods. In these monomeric complexes, the cobalt atom is in a distorted octahedral environment. The vibrational and electronic spectra of the complexes are discussed and are shown to agree with the structures. (C) 2000 Elsevier Science Ltd. All rights reserved.