Synthesis, structural characterization and Hirshfeld surface analysis of 3-acetylpyridinium and 4-acetylpyridinium picrate crystals

Abstract

Single crystals of 3-acetylpyridinium picrate (I) and 4-acetylpyridinium picrate (II) were grown in slow evaporation environments. Harvested crystals were characterized by single-crystal X-ray diffraction, infrared spectrum, diffuse reflectance and photoluminescence spectrum, thermal and Hirshfeld surface analysis. Crystal (I) crystallizes a triclinic crystal system with a centric (Pī) space group and (II) crystallizes in a monoclinic system with a centric (P21/c) space group. The molecule is associated with accommodating C-H•••O, N-H•••O and π•••π stacking interactions, very much responsible for the formation and strengthening of the supramolecular network. TG/DTA analysis reveals the thermal pattern of the complexes. Intermolecular interactions are quantified by Hirshfeld surface analysis.