22-Azametallacrown-8 complex with a triazole-bridged ligand: synthesis, structure and magnetic properties

Abstract

Reaction of Mn(OAc)₂·4H₂O with the H₂L ligand affords a new manganese 22-MC-8 azametallacrown [Mn₈(μ₃-O)₂(μ₃-OH)₂(μ₂-OH)₂(L)₆(OAc)₂(OH₂)₄]·2DMF (H₂L = 3-(2-oxyphenyl)-5-(pyrazin-2-yl)-1,2,4-triazole). The structural analysis of the complex reveals that the azaMC ring possesses –[Mn–O–Mn–N–N–Mn–N–N–Mn–N–N]– connectivity. The magnetic behavior of the complex shows the dominant antiferromagnetic interactions between the manganese ions with S = 4 and the frequency-dependent out-of-phase signal.