ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A new Hg(II) hybrid compound (C₆H₉N₂)[Hg₆Cl₁₃]·H₂O elaboration, crystal structure, spectroscopic, thermal, and DFT theoretical calculations

Chaima Ayari, Abdullah A. Alotaibi, Khalid M. Alotaibi, Valeria Ferretti, Werner Kaminsky, Frédéric Lefebvre, Cherif Ben Nasr, and Mohamed Habib Mrad

Laboratoire de Chimie Des Matériaux, Faculté Des Sciences de Bizerte, Université de Carthage, Zarzouna, Tunisie

E-mail: cherif_bennasr@yahoo.fr

Received: 7 May 2021  Accepted: 27 November 2021

Abstract:

Slow evaporation, at ambient temperature, reaction has produced a novel polymeric mercury (II) hybrid, ethylpyrazinium-tridecachloro-mercurate(II) monohydrate (C₆H₉N₂)[Hg₆Cl₁₃]·H₂O. The atomic structure can be characterized as layers of [Hg₆Cl₁₃]^– anions, water molecules, and nitrogen atoms linked by O–H…Cl hydrogen bonds, with the organic cations positioned among the inorganic layers and linked by N–H…O and C–H…Cl H-Bonds. Hydrogen bond strength and inter-contacts quantification were discussed using Hirshfeld surface analysis. It shows that 46.1% of the crystal structure’s stability is due to hydrogen bonding interaction of type H…Cl/Cl…H. The SEM/EDX analyses were carried out. Through the use of infrared spectroscopy, the vibrational characteristics of the material were studied and the assignments were accomplished by help of DFT calculations. The electrical properties, such as HOMO and LUMO levels, have been described. Finally, TG–DTA analysis was used to investigate the thermal behavior.

Graphical abstract

Keywords: X-ray diffraction; SEM–EDX; Spectroscopy FT-IR; DFT calculations; Hirshfeld surface; DTA/TGA

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-02002-1

Chemical Papers 76 (4) 2327–2340 (2022)