New Manganese(II) Coordination Compounds with 4-{[(1-Pyrrol-2-yl)methylene]amino}-4-1,2,4-triazole

The reaction of manganese(II) chloride with the azomethine ligand 4-{[(1H-pyrrol-2-yl)methylene]amino}-4H-1,2,4-triazole (HPyrtrz) yielded crystals of the 1D-polymeric compound [Mn(HPyrtrz)(HO)Cl] (I). The addition of the co-ligand 1,10-phenanthroline (phen) to the synthesis of I was found to led to the sequential crystallization of two products, namely, the 1D-polymeric compound [Mn(Phen)Cl] (II) and the mononuclear complex [Mn(phen)Cl] HPyrtrz (II). Complex III was found to be isolated as a single product in the reaction of compound I with phen or in the reaction of the known complex [Mn(Phen)Cl] with HPyrtrz, respectively. The crystal structures of compounds I-III were determined by single-crystal X-ray diffraction (CIF files CCDC № 2339139 (I), № 2344064 (II), № 2339140 (III)). For I and III, antimicrobial activity was studied against and bacterial strains and mold. According to the temperature dependence of magnetic susceptibility, antiferromagnetic exchange interactions between Mn ions ( = -2.69 cm) are realized in compound I. Spectral-luminescent studies showed that HPyrtrz, I and III exhibit blue luminescence in the solid phase.