Inorganic Hybrid Open-framework Structures: Synthesis and Structure of a Cobalt Phosphate-oxalate [C₄N₂H₁₂]₀.₅[Co₂(HPO₄)(C₂O₄)₁.₅]
A new open-framework inorganic-organic hybrid structure involving cobalt, [N2C4H12]0.5[Co2(HPO4)(C2O4)1.5], has been synthesized for the first time by hydrothermal methods. The three-dimensional structure is formed by the edge-shared CoO6 and CoO5 polyhedra forming a [Co2O9] dimer, that are connected with the PO4 polyhedra and the oxalate units forming one-dimensional channels. The amine molecules are located within these channels. The oxalate units have a dual functionality of connecting within the plane of the layer as well as out of the plane. The material is thermally stable up to 350°C and orders anti-ferromagnetically at low temperatures. Crystal data: a=7.494(1), b=7.726(1), c=17.852(3) Å, β=97.7(1)°; V=1024.2(2) Å3; space group=P21/c (no. 14); Z=4; M=389.9; Dcalc.=2.529 g cm−3; λ(Mo-Kα)=3.451 mm−1; λ=0.71073 Å; R1=0.04; wR2=0.10 and S=1.13.
A. Choudhury and S. R. Natarajan, "Inorganic Hybrid Open-framework Structures: Synthesis and Structure of a Cobalt Phosphate-oxalate [C₄N₂H₁₂]₀.₅[Co₂(HPO₄)(C₂O₄)₁.₅]," Solid State Sciences, Elsevier, Jan 2000.
The definitive version is available at http://dx.doi.org/10.1016/S1293-2558(00)00146-1
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