A Suberato-Pillared Mn(II) Coordination Polymer: Hydrothermal Synthesis, Crystal Structure, and Magnetic Properties of Mn2(H2O)[O2C(CH2)6CO2]2

A suberato-pillared Mn(II) coordination polymer Mn2(H2O)(C8H12O4)2 was hydrothermally synthesized at 170°C for 3 days and characterized by single-crystal X-ray diffraction. Crystal data: monoclinic, C2/c, Z=4, a=26.544(5), b=7.617(2), c=9.187(2) Å, β=105.38(2)°, V=1791.0(7) Å3, R1=0.064 and wR2=0.162. The compound shows a layered structure consisting of inorganic Mn oxygen polyhedral layers and organic regions. The inorganic Mn oxygen layers are generated from Mn2O10 bioctahedral units, which share corners with neighbors to form zigzag chains along the [001] direction and are, along the [010] direction, further connected by carboxylate groups of the suberato ligands and hydrogen bonds. The magnetic studies indicated that the compound becomes antiferromagnetic at low temperatures with TNéel=12 K and follows Curie–Weiss law χm(T+22.429)= 4.48 cm3 mol−1 K between 25 and 300 K. Upon heating in Ar stream, Mn2(H2O)(C8H12O4)2 decomposes in three steps.