Fig. 3. A portion of the crystal structures of Co₂(dobdc)·0.58CO at 90 K, Co₂(dobdc)·2.9CO₂ at 150 K,²⁹ Co₂(dobdc)·5.9O₂ at 100 K, Co₂(dobdc)·3.8N₂ at 100 K, Co₂(dobdc)·2.0CH₄ at 100 K, Co₂(dobdc)·2.0Ar, and Co₂(dobdc)·1.3P₄ at 100 K viewed along the c axis, as determined by single-crystal X-ray diffraction; purple, red, gray, blue, light blue, light orange, and white spheres represent Co, O, C, N, Ar, P, and H atoms, respectively. Note that the O₂ molecules bound to the Co^II sites in Co₂(dobdc)·5.9O₂ were found to be disordered over two orientations with relative occupancies of 73(3)% and 27(3)% (Fig. S8†), but only one of these orientations (73(3)% occupancy) is shown for clarity. In the structure of Co₂(dobdc)·1.3P₄, the P₄ molecules were found in two positions (Fig. S10†), one with P₄ molecules coordinated to the Co^II sites (45.5(10)% occupancy) and another 3.88(3) Å away from the Co^II sites centers (20.6(10)% occupancy), but only the coordinated P₄ molecules are shown for clarity. The structure of Co₂(dobdc)·2.9CO₂ has been reported previously²⁹ and is shown here to facilitate comparisons.