Fig. 2. X-ray crystal structures of (a) 4 and (b) 1 (ΔCoII – orange, Λ CoII – purple, N – blue, C – gray, H – white); orange lines indicate closest metal–metal separations, to illustrate geometry. (c, d) Two space-filling representations of 4, rotated 90° with respect to each other, where the carbon atoms of one ligand are colored pink.
