“…Most often, an SCO is encountered in (pseudo)octahedral complexes of iron(II) in a N6-coordination environment, , such as provided by many bi- − and tridentate − N-donor heterocyclic ligands or ligands of higher denticity. − From the latter group, a unique class of extended-tripodal (cage) ligands produces rigid and chemically stable transition-metal complexes, so-called clathrochelates, which can be easily synthesized by self-assembly on an appropriate metal ion, functionalized at several (apical and ribbed) positions by various functional groups , and applied onto surfaces via chemical bonding or deposition from solutions, all being important qualities for practical applications in molecular sensing, electronics, and spintronics . The HS cobalt(II) clathrochelates (or pseudoclathrochelates if one capping boron atom is missing; Scheme ) often show a single-molecule magnet (SMM) behavior with some record values for cobalt(II) compounds, , and in rare cases, , they undergo a temperature-induced SCO, sometimes anticooperative, stemming from a trigonal-prismatic geometry imposed by the rigid cage ligand and its resistance to distortions .…”