The use of carborane anions in coordination polymers and extended solids

The use of carboranes as counter-anions for metal-organic frameworks or coordination polymers is reviewed. While carboranes are weakly coordinating they can form interactions to Ag(I) as well as other metal centers. Thus carboranes may have one of a number of roles in transition metal networks: as a non-coordinating templating counter-anion; as a bulky terminal ligand, and thus topologically trivial but likely to be structure-directing to some degree; or as a bridging ligand.