Facile carboxylate ligand variation of heterotrimetallic 12-metallacrown-4 complexes

Three single-crystal X-ray structures of a series of ErIIINa(L)4[12-MCMnIII(N)shi-4] complexes, where L is either trimethylacetate, benzoate, or salicylate and shi3− is salicylhydroximate, are presented. The self-assembled supramolecular coordination complexes demonstrate the ability to vary the bridging carboxylate monoanion in this heterotrimetallic family of compounds.153