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Source of materialAmixture of Co(CH 3 COO) 2 · 4H 2 O(1mmol) and N-2-nitrobenzenesulfonylglycine (1 mmol, 2-NBS-GlyH) in 15 mL H 2Ow as stirred about twenty minutes to give ared solution. Then the pH was adjusted to 7with 0.1 MKOH solution. The reaction mixture was heated on awater bath for 12 hat70°C, and then filtered. Red crystals were separated from the mother liquor by slow evaporation at room temperature after 7days. DiscussionThe design and synthesis of new metal-organic frameworks has been proven to be apromising field, not only due to their potential applications as functional solid materials in host-guest chemistry, ion exchange and catalysis, but also owing to their intriguing variety of architectural features and fascinating new topologies [1][2][3][4][5][6][7]. Intelligent design of ligands and proper choice of metal centers are the main keys to the preparation of new coordination polymers. Meanwhile, N-protected amino acids, being biologically important compounds derived from naturally occurring amino acids, have been studied extensively in the coordination chemistry of metal ions [8,9]. The crystal structure of the title compound consists of mononuclear units. The 2-NBS-Gly ligand acts as an anion in the complex. Two carboxylate groups of 2-NBS-Gly coordinate the Co(II) ion in amonodentate mode. The coordination environment of the Co(II) ion can be described as as trongly distorted octahedron with three trans angles ranging from 83.61 (9)

C13H10AgN3O6, orthorhombic, Pccn (no. 56), a = 24.887(3) Å, b = 8.004(1) Å, c = 14.011(1) Å, V = 2791.0 Å3, Z = 8, Rgt(F) = 0.0301, wRref(F2) = 0.0821, T = 296 K.