Structure and magnetic properties of a one-dimensional chain complex {[Mn2(TPA)2(o-phth)](ClO4)2}n

A terephthalate-bridged chain complex of {[Mn2(TPA)2(o-phth)](ClO4)2}n (TPA=tris(2-pyridylmethyl)amine, o-phth=terephthalato dianion) was synthesized and characterized by X-ray crystallography and magnetic measurements. In the compound, each terephthalate acts as tetrakis(monodentate) ligand and links manganese(II) pairs to yield a one-dimensional chain. The manganese(II) ion coordinates with four nitrogen atoms of TPA and two oxygen atoms of two carboxylate groups from two terephthalate ligands and occurred in a distorted octahedral structure. The complex crystallizes in triclinic space group P1̄, with α=108.673(4)°, β=93.420(5)°, γ=92.342(5)°; a=8.170(2) Å, b=9.904(3) Å, c=15.134(4) Å; V=1155.7(5) Å3; Z=1; R1=0.0567, wR2=0.1458. In the temperature range 4–300 K, magnetic measurement shows that the exchange interaction of the two manganese(II) ions is antiferromagnetic, and the values obtained for J, g and zj′ are −1.20, 1.97 and −0.03 cm−1, respectively.