A mononuclear Mn2+ complex based on a novel tris-(ethyl acetate) pendant-armed tetraazamacrocycle: Effect of pyridine on self-assembly and weak interactions

► Pyridine containing tetraazamacrocycles are still in need of further investigations. ► Pyridine led to π-π stacking of [Mn1]2+ and nonclassical CH…O hydrogen bonding. ► The resulting interacting mononuclear complexes mediated weak magnetic exchanges. ► Pyridine affected the nature of DNA binding with 2.