Phosphonates as ligands in Co-Cr heterometallic clusters

摘要

Two new Co(ii)-Cr(iii) phosphonate clusters with [Co~(II)_4Cr~(III)_4] and [Co~(II)_8Cr~(III)_4] cores have been synthesized by a displacement reaction from a pre-formed heterometallic carboxylate cage. Magnetic studies show overall antiferromagnetic interactions are present in these clusters.