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

One mixed-ligand complex of [Mn2(mpa)2(2,20-bpy)2]n (1) (mpa ¼ m-phthalate and 2,20-bpy ¼ 2,20-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 p–p stacking interactions. It was stable in air up to ca. 245 8C. The magnetic measurements suggest that the polymer gives weak antiferromagnetic behavior. q 2004 Elsevier B.V. All rights reserved