Investigation on Crystal Structure, Spectroscopic Characterization, Thermal Analysis, Conductivity Study and Antioxidant Activity of a Novel Compound Containing Cluster Entities (C7H10N)2·(HgCl2)2·(Hg2Cl6)

The new compound based on mercury (II) (C₇H₁₀N)₂·(HgCl₂)₂·(Hg₂Cl₆) 1 was described by numerous approach: X-ray diffraction (powder and single crystal), FT-IR, photoluminescence, UV–Vis, Hirshfeld surface analysis, thermal analysis, electric conductivity and finally a biological study was carried out through the antioxidant activity. Depending on the XRD data, the dimers (Hg₂Cl₆)²⁻, the infinite chains (parallel to the c-axis) formed by (HgCl₂) and the 2-ethylpyridinium cation are bound together by weak H-bonds and electrostatics interactions forming a 3D network. The purity of 1 was checked by PXRD. The Hirshfeld surface analysis was used to investigate intermolecular interactions present in the compound 1. Infrared spectroscopy has been used to assign the varied functional groups. UV–Vis spectroscopy showed two bands located respectively at 240 nm and 280 nm. The photoluminescence analysis indicates the presence of fluorescence at 235 nm. A phase transition around 345 K has been shown by thermal analysis studies (TG-DSC and TG–DTA). The complex impedance of 1 has been performed in temperature range 295–343 K. Finally, the antioxidant activity study reveals that compound 1 can be used as a free radical scavenging substance. [ABSTRACT FROM AUTHOR]