Cobalt Complexes of the Chelating Dicarboxylate Ligand esp: A Paddlewheel-Type Dimer and a Heptanuclear Coordination Cluster

摘要

The coordination chemistry of Co(II) with the chelating dicarboxylate ligand esp (esp = α,α,α’,α’-tetramethyl-1,3-benzenedipropionate) is explored. We report here the bimetallic paddlewheel-type dimer, Co2(esp)2(EtOH)2 (>1), and a bowl-shaped, heptanuclear coordination cluster, Co7(OH)4(Hesp)2(esp)4(MeCN)24MeCN (>2). Crystal structures of both complexes are reported as well as their magnetic properties, which indicate antiferromagnetic interactions among the Co(II) ions.