Hydrothermal synthesis and magnetic behavior of a novel layered coordination polymer generated from manganese(II)...

A novel, two-dimensional organic/inorganic coordinate polymers, Mn2(H2O)[O2C(CH2)4CO2]2, was synthesized as single crystals by the hydrothermal reaction of MnCl2 with adipic acid in the presence of base and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermal analysis, and SQUID magnetic measurement. It crystallized in the monoclinic space group C2/c(No. 15), with a = 21.671(2) A, b = 7.6023(7) A, c = 9.1452(9) A, beta = 108.849(7) A, Z = 4. The title compound presents a structure constituted by the stacking along [100] of MnO6 layers interleaved with adipate ions. The novel feature of the anionic layer is that it contains close-packed trans alkyl chains residing in an extended framework. Magnetization measurement shows this compound is antiferromagnetic below 15 K.