Abstract
Reaction of sodium azide with manganese(II) and diethylnicotinamide (DENA) leads to the two-dimensional system trans-[Mn(DENA)2(N3)2]n. The compound crystallises in the P2/c (monoclinic) group. Structural determination shows layers of manganese atoms bridged by means of single µ1,3-azido bridges. The polymeric structure is achieved by means of two different µ1,3-azide bridges, one of them with Mn–N–N bond angles of 148.4(2)°, whereas the second nonequivalent azido bridge has the unusual feature of quasi-linear coordination with Mn–N–N bond angles of 171.7(2)°. Molecular orbital calculations and susceptibility data show antiferromagnetic interaction and similar constant coupling values for the two superexchange pathways, in spite of the structural differences. Susceptibility, magnetisation, and EPR properties are compared with related azido systems.
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