Synthesis, Crystal Structure and Magnetic Property of a New Three-Dimensional Mn–Na Heteronuclear Coordination Complex Based on 3,5-Pyrazoledicarboxylic Acid

Abstract

A new three-dimensional Mn–Na heteronuclear coordination polymer based on 3,5-Pyrazoledicarboxylic acid (H3dcp) and NCS− as the co-ligands {Mn(Hdcp) [Na2(H2O)2](NCS)2}n(1) has been synthesized and structurally characterized by single-crystal X-ray diffraction analysis. The complex crystallizes in orthorhombic system, space group Cmca, with a = 16.4275(14), b = 18.4935(16), c = 11.0252(9) A, β = 90°, V = 3349.5(5) A3, Z = 8. Analysis of the crystal packing of the complex reveals that it has 1D Na–O chains in which the adjacent Na(I) ions are linked through two types of oxygen bridges afforded by carboxyl oxygen atoms of 3,5-Pyrazoledicarboxylic acid ligands and solvent water molecules. While the interconnection of Mn(II) ions by chelating and bridging μ3-Hdcp anions result in a 2D grids, which are further pillared by the 1D Na–O chain to generate a 3D polythreaded architecture with the Schlafli symbol of (43·63)2(43·67)(49·611·8). Furthermore, magnetic susceptibility measurements of this complex shows weak antiferromagnetic exchange between the manganese(II) ions (θ = −3.16 K).