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Figure 5
A view of the two crystallographically independent octahedron chains in TAF-CNU-1 (I), which run along the c-axis direction and are each derived from Ni1 or Ni2. The unit cell is also shown. Note that each octahedron chain and the coordinated terephthalates give rise to two crystallographically independent ribbon-type packing motifs of composition Ni(BDC)·2H2O, in which only one carboxyl­ate group of each terephthalate is part of the coordination spheres of Ni1 or Ni2, respectively. By crystal symmetry, the number of chains derived from Ni2 is twice that from Ni1.

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