Deprotonated Complexes of Bis(o-aminobenzenesulfonyl)ethylenediamine with Mn(II), Co(II), Ni(II) and Cu(II)

Abstract

Abstract The new complexes K2[ML2] (M = ═Mn, Cu), K2[ML2(H2O)2] (M = Co, Ni), K2[Cu2L2(OH)2] and K2[Cu2L2(OH)2(H2O)4], where LH2 = Bis(o-aminobenzenesulfonyl)ethylenediamine, have been prepared. Properties, X-ray powder patterns, molar conductance measurements, magnetic moments and spectral (IR, diffuse reflectance, visible in solution) data are discussed in terms of possible structural types and the nature of the bonding. Distorted octahedral geometries are proposed for the Mn(II), Co(II), Ni(II) and dimeric Cu(II) chelates in the solid state, while K2[CuL2] appears to have a distorted tetrahedral structure. The Mn(II) complex exhibits evidence of a polymeric configuration. The L 2- anion acts as a bidentate N2 or tetradentate N4 ligand.