Abstract
Two novel azide/formate manganese(II) coordination polymers, based on isonicotinic acid N-oxide, [Mn2L2(N3)2(CH3OH)]n (1), and [MnL(HCO2)]n (2) [HL = isonicotinic acid N-oxide (INO)] have been synthesized under solvothermal conditions and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The structure of 1 consists of unprecedented 1D chains built by double syn,anti carboxylate bridges, double EE azide and mixed bridges of syn,syn carboxylate and the N-oxide group, which are further linked through azido (EE) and INO to generate a unique 3D framework. Complex 2 is a 2-fold interpenetrating pcu net based on hexanuclear Mn6 clusters, which are formed by the linkage of six MnII ions with six syn,syn,anti formate anions and six syn,syn carboxylate groups. Magnetic susceptibility measurements reveal that dominant antiferromagnetic coupling exists between the MnII ions in 1 and 2.
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