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Same composition but different structures characterize the manganese complexes 1 and 2 of the formula [Mn2(bpym)(N3)4], which are obtained by the reaction of manganese(II) nitrate with 2,2′-bipyrimidine (bpym) and sodium azide in aqueous solution. Compound 1 has a honeycomb layered structure (shown on the right) and exhibits overall ferromagnetic interactions; 2 has a three-dimensional polymeric structure and shows overall antiferromagnetic interactions.
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Munno et al. (1996) studied this question.
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