A Manganese Carboxylate with Geometrically Frustrated Magnetic Layers of Novel Topology

A new two-dimensional coordination polymer, Mn 2 (THFTC)(H 2 O) 3 (THFTC = tetrahydrofuran-2,3,4,5-tetracarboxylate), was hydrothermally synthesized and characterized by single-crystal X-ray diffraction and magnetic measurements. The Mn 2+ cations, linked by the carboxylate groups of the THFTC, form a geometrically frustrated network with a novel (3.5 3 )(3.5.3.5) topology. This topology is closely related to the widely investigated triangular and Kagome lattices. According to the magnetic measurements, the compound does not establish a long-range ordered state down to 1.8 K, a sign for possible spin frustration.