Fig. 4. Top: diagrammatic representation of key dihedral and torsion angles in 2fa and 2fa′. A: Co2···Co2 metal atom plane; B: Co2–carboxylate oxygen plane; C: aromatic plane of ndc; D: Co2 cluster metal–metal axis; E: metal–nitrogen; F: N···N axis of bpy. Both crystallographic symmetry and geometrical disorders have been considered in measuring these parameters. Bottom: table of relevant angles in °.
