Manganese(II) coordination polymer having pyrazine and μ-phenolato bridging: Structure, magnetism and biological studies

One manganese(II) coordination polymer, {[Mn(L)(pyz)]ClO4·2(H2O)}n has been synthesized and its molecular structure was determined by single crystal X-ray diffraction, which reveals that the polymeric structure consists of simultaneous Mn–Pyz–Mn and Mn–O(phenoate)–Mn bridges between the metal centers. Variable temperature magnetic studies give g=2.037(4), J=−1.90(4)cm−1, ϑ=0.5K values, using a simple dinuclear Mn–Mn model, and indicates that the major exchange pathway is via the two phenoxide bridges and the pyrazine has little influence. The coordination polymer also shows enhanced antibacterial activity compared with the standard antibiotic levofloxacin.