A novel linear [Mn4N8O2] complex: in-situ synthesis, structure and magnetic property

A novel mixed-valent tetranuclear manganese complex, [MnII2MnIII2(dophe)2(DMSO)7(H2O)] (H5dophe = di-[5-(2-oxyphenyl)-pyrazole]-3-hydroxamic ether) was prepared and characterized through X-ray crystallography, elemental analysis and IR spectra. The molecule contains a linear [MnII2MnIII2N8O2] core with two dinuclear single bondNsingle bondNsingle bond bridged subunits connected by two μ2-O atoms. Two dophe5 − ligands are located opposite to each other. Magnetic studies indicate the dominance of intramolecular antiferromagnetic interactions.