One Novel Mn(II) Complex with 1-Substituted-1H-1,2,3-triazole-4-carboxylic Acid: Crystal Structure, Fluorescence and Hirshfeld Surface Analysis

The crystal structure of one novel Mn(II) complex, [Mn(pmta)(3)](2)[Mn(H2O)(6)]center dot 4H(2)O (1), is reported (Hpmta = 5-methyl-1-phenyl-1H-1,2,3-triazole-4-carboxylic acid). In the title compound, the asymmetric unit consists of a [Mn(pmta)(3)](-) anion, half [Mn(H2O)(6)](2+) counter cation and two lattice H2O molecules, and the intra-and intermolecular hydrogen bonds connect the complex into a supramolecular structure. The liquid-state fluorescence spectra of complex 1 have been determined. Hirshfeld surface analysis was also studied. The main intermolecular interactions in the complex are O center dot center dot center dot H and H center dot center dot center dot H contacts.