Crystal structure and magnetic properties of a helical ribbon polymer based on dimeric manganese(II) subunits

One mixed-ligand complex of [Mn2(mpa)2(2,2′-bpy)2]n (1) (mpa=m-phthalate and 2,2′-bpy=2,2′-bipyridine) has been synthesized and structurally established by single-crystal X-ray diffraction. It consists of one-dimensional ribbons featuring carboxylate-bridged dinuclear units. The one-dimensional ribbons are assembled into three-dimensional networks by π–π stacking interactions. It was stable in air up to ca. 245 °C. The magnetic measurements suggest that the polymer gives weak antiferromagnetic behavior. [Copyright &y& Elsevier]