The development of advanced multifunctional devices requires molecular systems that can switch the physical properties upon the application of mild external stimuli. Recently, Cano and co-workers reported the SCO active Co(II) molecular nanomagnet that can exhibit pH-based switching of luminescent, redox, and magnetic properties . Two complexes )/1.252(4) Å). In both complexes, the octahedral coordination sphere exhibits some distortions. The average Co(II)-N distances at 120 K are of typical Co(II) LS form.. The difference in the weak interactions between the complex cation and solvent molecules and counteranions is the reason for the difference in the crystal packing for the two pH-dependent isomers.