Synthesis, structural characterization, Hirshfeld surface analysis and QTAIM analysis of 3-(4-cyano­thio­phen-3-yl)-[1,2,4]selena­diazolo[4,5-a]pyridin-4-ium chloride

Abstract

The title compound was produced by the reaction between 3,4-di­cyano­thio­phene and 2-pyridyl­selenyl chloride and isolated as a salt that crystallizes in the triclinic space group P1. Notable features include strong chalcogen inter­actions (Se⋯Cl and Se⋯S), as revealed through Hirshfeld surface analysis, which also highlights significant contributions from N⋯H/H⋯N, C⋯H/H⋯C and H⋯H contacts in the crystal packing.

The title compound, C₁₁H₆N₃SSe⁺·Cl⁻, produced by the reaction between 3,4-di­cyano­thio­phene and 2-pyridyl­selenyl chloride was isolated as a salt that crystallizes in the triclinic space group P1. Notable features include strong chalcogen inter­actions (Se⋯Cl and Se⋯S), as revealed through Hirshfeld surface analysis, which also highlights significant contributions from N⋯H/H⋯N, C⋯H/H⋯C and H⋯H contacts in the crystal packing. Supra­molecular inter­actions were further analysed using density functional theory (DFT) and quantum theory of atoms in mol­ecules (QTAIM) at the ωB97XD/6–311++G** level of theory.