Rheological phase synthesis, characterization and magnetic property of a cobalt(II)diphosphonate

Abstract

A new Co(II) diphosphonate compound, [Co(HEDPH2)2] (4,4′-bipyH2) · H2O (1) has been successfully obtained by a rheological phase reaction at 80°C. Single-crystal diffraction analysis shows a 1-D chain structure and the 1-D chains are assembled via hydrogen bonds into a 3-D supramolecular structure with channels. The protonated 4,4′-bipy molecules are encapsulated in the channels. Magnetic study shows 1 to exhibit antiferromagnetic interaction in the 1D Co--O--P--O--Co chain. Crystal data for 1: monoclinic, space group Cc, a = 15.754(6) Å, b = 14.457(5) Å, c = 10.020(4) Å, β = 92.024(6)°, V = 2280.7(14) Å3, Z = 4.