Abstract Three dinuclear cobalt(II) compounds with different fluoro-substituted benzoate ligands, named as [Co2(3,4-dfba)4(bpp)2]n (1), [Co2(3-fba)4(bpp)2]n (2) and {[Co2(2,4-dfba)4(bpp)2(H2O)]·(bpp)(H2O)}n (3) (3,4-Hdfba = 3,4-difluorobenzoic acid, 3-Hfba = 3-fluorobenzoic acid, 2,4-Hdfba = 2,4-difluorobenzoic acid, bpp = 1,3-bis(4-pyridyl)propane), have been successfully synthesized. In all compounds, Co(II) centers feature hexa-coordinated environments with distorted octahedrons. Among them, compounds 1 and 2 are isomorphic which perform three-dimensional (3D) network, whereas 3 displays a 2D layer structure. This modulation leads to different antiferromagnetic interactions between the metal ions (J1 = −6.43 cm−1, J2 = −2.28 cm−1 for 1, J1 = −19.44 cm−1, J2 = −6.08 cm−1 for 2, J = −12.65 cm−1 for 3).

中文翻译：

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三种基于 1,3-双（4-吡啶基）丙烷的新型钴 (II) 配位聚合物：合成、结构和磁性

摘要 具有不同氟取代苯甲酸酯配体的三种双核钴 (II) 化合物，命名为 [Co2(3,4-dfba)4(bpp)2]n (1), [Co2(3-fba)4(bpp)2 ]n (2) 和 {[Co2(2,4-dfba)4(bpp)2(H2O)]·(bpp)(H2O)}n (3) (3,4-Hdfba = 3,4-二氟苯甲酸, 3-Hfba = 3-氟苯甲酸, 2,4-Hdfba = 2,4-二氟苯甲酸, bpp = 1,3-双(4-吡啶基)丙烷), 已成功合成。在所有化合物中，Co(II) 中心都具有扭曲八面体的六配位环境。其中，化合物1和2是同构的，执行三维（3D）网络，而3显示2D层结构。这种调制导致金属离子之间不同的反铁磁相互作用（J1 = -6.43 cm-1，J2 = -2.28 cm-1 为 1，J1 = -19.44 cm-1，J2 = -6.08 cm-1 为 2，J = −12.65 cm−1 对于 3)。