Direct electrochemical synthesis of cobalt(II) complexes of tosylamides: crystal structures of [CoL(2)py(2)], [CoL2DMF2], [CoL(2)bipy] and [CoL(2)phen], 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)sulfony l]-imino-1 H-pyridine (HL) and the appropriate neutral coligand: L' (pyridi ne, 2,2'-bipyridine, 1,10-phenanthroline or N,N-dimethylformamide). The str uctures of bis-(N,N-dimethylformamide)bis{[(4-methylphenyl)sulfonyl]-2-pyri dyl-amide}cobalt(II), bis-(pyridine)bis{[(4-methylphenyl)sulfonyl]-2-pyridy l-amide}cobalt(II), 2,2'-bipyridine bis{[(4-methylphenyl)sulfonyl]-2-pyridy l-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 env ironment. The vibrational and electronic spectra of the complexes are discu ssed and are shown to agree with the structures. (C) 2000 Elsevier Science Ltd. All rights reserved.