Electrochemical synthesis and characterization of nickel(II) complexes with N-2-pyridyl-sulfonamide ligands

Article abstract of DOI:10.1002/zaac.200570024

Heteroleptic nickel(II) complexes [NiL₂L′] of a series of monoanionic and potentially bidentate N-2-pyridyl-sulfonamide ligands [HL] and 2,2′-bipyridine or 1,10-phenanthroline (L′) have been prepared by electrochemical oxidation of a nickel anode in an acetonitrile solution of the ligands. The complexes have been characterized by microanalysis, IR and electronic spectroscopy, magnetic measurements and LSI mass spectrometry. The crystal structure of [Ni(Ms6mepy)₂(bipy)] has been determined by x-ray diffraction and shows the metal in an octahedral NiN₆ environment. Octahedral structures are also proposed for the other complexes with the N-2-pyridyl-sulfonamide ligands acting as N,N′ or N,O bidentate systems, depending on the position of the methyl substituent on the pyridine ring.