Novel 3-D PtS-like Tetrazolate-Bridged Manganese(II) Complex Exhibiting Spin-Canted Antiferromagnetism and Field-Induced Spin-Flop Transition

Two novel manganese(II) tetrazolate coordination polymers, Mn3(Hbta)4(μ2-OH)2(H2O)·2H2O (1) and Mn(bta)(H2O) (2), were obtained by the hydrothermal reaction of MnCl2·4H2O with N,N-bis[1(2)H-tetrazol-5-yl]amine (H2bta) in different pH values. Compound 1 exhibits a 2-D (4,4) layer structure, which is built from binuclear Mn2(μ2-OH)2 subunits and μ3-bridging Hbta− linkers. Compound 2 is a helical framework, and its 3-D PtS-like net is constructed by Mn2(bta)2 dimers and μ5-bridging bta2− linkers. Magnetic measurements reveal that compound 1 displays an antiferromagnetic ordering, while compound 2 exhibits the coexistence of a spin-canted antiferromagnetic coupling and a field-induced spin-flop transition.