A terephthalate-bridged two-dimensional heteronuclear Cu(II)-Mn(II) complex with a terminal 2,2′-dipyridylamine ligand

Abstract

A terephthalate-bridged heteronuclear Cu(II)-Mn(II) complex [Cu 2 Mn(dipya) 2 (tpht) 3 ] n , I, where dipya is 2,2-dipyridylamine and tpht is the anion of 1,4-benzenedicarboxylic (terephthalic, H 2 tpht) acid was synthesized under hydrothermal conditions. The obtained complex I was characterized by a single-crystal X-ray diffraction, FTIR spectroscopy, TG/DSC analysis and magnetic measurements. The Cu(II) and Mn(II) metal centers adopt distorted octahedral geometry and they are linked by bridging tpht ligands. Two crystallographically different tpht anions are coordinated as tridentate and hexadentate ligands forming two-dimensional layers. The layers are interconnected by hydrogen bonds and additionally stabilized by non-covalent C-H⋯π interactions. The measurements of magnetic susceptibility proved that I is an almost perfect paramagnet.