A copper(II) chain compound with hydrogenphosphate bridges organized in a double-chain structure.: Synthesis, structure and magnetic properties of [Cu(1,10-phenanthroline)(μ-HPO4)(H2O)2]n

A new Cu(II) chain compound, [Cu(1,10-phenanthroline)(mu-HPO4))(H2O)(2)] 1 has been synthesized hydrothermally and structurally characterized by elemental analysis, IR, EPR spectrum and single-crystal X-ray diffraction. The Cu(II) ion is tetragonally coordinated with a phen ligand and two aqua ligands in the equatorial plane (Cu-N distance 2.006(2) angstrom and Cu-O distance 1.969(2) angstrom) and hydrogenphosphates as axial ligands (Cu-O distance 2.470(2) angstrom), thereby forming a linear chain. The crystal lattice is formed from antiparallel chains, kept together by relatively strong phosphate-water H-bonds (intra- and intermolecular) with (OO)-O-... contacts of 2.615(3) and 2.672(3) angstrom and by interpenetrated stacking of the phen ligands with other chains. The magnetic susceptibility measurements (5-300 K) agrees with a weak antiferromagnetic chain interaction between the Cu centers with J value of -5.86 cm(-1). (c) 2005 Elsevier B.V. All rights reserved.