Structure and Magnetic Field-Induced Transition in a One-Dimensional Hybrid Inorganic-Organic Chain System, Co2(4,4′-bpy)(tfhba)2•4,4′-bpy (4,4′-bpy=4,4′-Bipyridine; tfhba=2,3,5,6-Tetrafluoro-4-hydroxybenzoate)

Two isostructural hybrid inorganic-organic frameworks, M-2(4,4'-bPy)(tfhba)(2)center dot 4,4'-bPy, (M = Co (1), Zn (2); 4,4'-bpy = 4,4'-bipyridine; tfhba = 2,3,5,6-tetrafluoro-4-hydroxybenzoate) have been synthesized and their structures elucidated using single crystal X-ray diffraction. These materials are the first hybrid structures synthesized using the tfhba ligand. They contain a one-dimensional chain of corner-sharing MO4N trigonal bipyramids that has not been observed to date for Co2+ units. The magnetic properties of 1 have been investigated and indicate ferromagnetic ordering along the chains, with weak antiferromagnetic interactions between them. Overall the system is antiferromagnetic with a Neel temperature of 3 K, but undergoes a field-induced magnetic phase transition at 3 kOe.