Ferromagnetic Behavior of an Uncommon Trinuclearcopper(II) Coordination Polymer Based on Tartarate and 1,2-bis(4-Pyridyl)ethane Linker

A new Cu(II) based metal-organic framework (MOF) having formula [Cu3(H2Tar)(Tar)-(H2O)(Bpa)] · 3H2O (I) (H4Tar = tartaric acid, Bpa = 1,2-bis(4-pyridyl)ethane) has been characterized by elemental analysis, FT-IR spectra, thermal analysis, and single-crystal X-ray diffraction (CIF file CCDC no. 1575136). In I, the Cu(II) center are connected by four symmetry-related tartrate ligands into a 2D layer encapsulating trinuclear cluster, which are further bridged by Bpa molecules into a 3D framework. Complex I exhibits strong ferromagnetic behavior between metal centers.