Abstract
We are reporting the first supramolecular dimeric units of basic carboxylates. The neutral [Fe(III)₂M(II)O] motif for different 3d M metals is covalently bound through 2,2'-bipyrimidine. We have structurally characterized the hexanuclear clusters and the related trinuclear building blocks. Their magnetic properties have been fully analyzed and DFT calculations have been performed as a supplementary tool. All results evidence a weak antiferromagnetic interaction through the bpym bridge between isolated spin ground states (in some examples) arising from intra-Fe₂MO core exchange couplings.
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