Figure 2.
Molecular structure of 3 (plot with 30% probability ellipsoids, cation only) shown with crystal structure labeling scheme. Select bond distances (Å) for [Co(acacen)(X)2]+ derivatives show an increased Co-N(3) and Co-N(4) bond distance for 3. The axial Co-N bond distance of 3 is the longest (averaging 1.965 Å) due to unfavorable steric interactions between the methyl groups of the axial ligand with the planar acacen backbone. a Crystal structure of 1-Br reported in Inorg. Chem. 1997, 36, 2498-2504.