4-Aminopyridine 2 4-aminopyridine 2 Cambridge Structural Databases 2 Chlorine compounds 2 Cobalt 2 Cobalt complexes 2 Cobalt compounds 2 Complexation 2 Coordination reactions 2 Crystal structure 2 Dimers 2 Hirshfeld analysis 2 Horizontal displacements 2 Hydrogen bonds 2 Ligands 2 Pyridine 2 Single crystal X-ray diffraction analysis 2 Single crystal x-ray diffraction 2 Single crystals 2 Supramolecular chemistry 2 Supramolecular structure 2 Surface analysis 2 X ray diffraction analysis 2 cobalt complex 2 crystal structure 2 fingerprint plots 2 pyridine-pyridine dimer 2 π-π stacking 2