Synthesis, structures and magnetic properties of oxamido-bridged trinuclear Cu(II)–Mn(II)–Cu(II) complexes

Based on self-assembly of the dissymmetrical mononuclear entity CuL(CH3OH) [H2L = (E)-N1-(2-((2-aminocyclohexydiimino)(phenyl)methyl)-4-chlorophenyl)-N2-(2-benzyl-4-chlorophenyl)oxalamide] with Mn(II), two trinuclear complexes were prepared. They are of the formula [(LCuN3)2Mn(CH3OH)2] · 2CH3OH · 2H2O (1) and [(LCuSCN)2Mn(H2O)2] · 4CH3OH (2). Their magnetic properties were studied by susceptibility versus temperature measurement, the best fitting of the experimental data led to J = −14.40 cm−1 for 1 and J = −15.48 cm−1 for 2. Hydrogen bonds help complex 1 to produce a novel S type one-dimensional chain-like supramolecular structure. In complex 2, Cl⋯Cl interaction also results in the formation of a one-dimensional structure.