The search for optically cyclable molecular cations is ongoing. Earlier, we investigated diatomic ions of the main group elements with a goal to find transitions suitable for cycling. The results were disappointing-compared to the isoelectronic neutral species with good OCCs, the transitions in the cations generally featured less favorable properties. We attributed this difference to more delocalized electronic structure and higher density of states in the cations, which present challenges in the design of cationic OCCs. Other computational studies have shown that BO + and SiBr + are not promising for laser cooling. Here, we extend our search for cyclable molecular cations to a series of diatomic radical-cations comprising a d-block metal and a p-block ligand that are isoelectronic (in their valence shell) to the successfully laser-cooled neutral molecules.