Synthesis, crystal structure and magnetic properties of a novel cross-net-shaped metallamacrocycle

A novel cross-net-shaped metallamacrocycle, image (H4L = (Z)-3-(salicylhydrazinocarbonyl) propenoic acid), has been prepared and characterized. The crystal structure contains seven crystallographically unique manganese ions, in which two opening 13-membered metallacrown rings and two strands, Mn–N–N–Mn, are bridged by eight μ-maleoyl groups. The high nuclearity of the molecule shows large magnetic moments, with the value of μeff at 300 K is 19.01 μB.