Anissa Hannachi, A. Valkonen, M. Rzaigui
Mar 15, 2019
Citations
0
Influential Citations
15
Citations
Journal
Polyhedron
Abstract
Abstract Two new thiocyanate complexes have been synthesized with two different thiocyanate anion sources using 1-(2-pyrimidyl)piperazine and CoCl2·H2O. These compounds were characterized by single X-ray diffraction, FTIR, UV–Vis and TGA–DTA. The antibacterial activity was also examined. The XRD showed that compounds 1 and 2 crystallized into monoclinic and orthorhombic systems, respectively. In compound 1, cobalt is surrounded by two isothiocyanate anions and two nitrogen-amides, while in compound 2 it is surrounded by four isothiocyanate ligands and a separate protonated amide. Different interactions packed the system through N H⋯S, N H⋯O and O H⋯S hydrogen bonds forming a ring. Gap energy determination revealed two diverse behaviors, the first being characteristic of a semiconductor and the second of an insulator. In the 10–500 °C range, the thermal behaviors were investigated and showed the decomposition of the two complexes with metal complexes residues. The antibacterial analysis presented a weak performance.