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Thiocyanate precursor impact on the formation of cobalt complexes: Synthesis and characterization

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)222-230
JournalPolyhedron
Volume161
Early online date30 Dec 2018
DOIs
Publication statusPublished - 15 Mar 2019
Publication typeA1 Journal article-refereed

Abstract

Two new thiocyanate complexes have been synthesized with two different thiocyanate anion sources using 1-(2-Pyrimidyl) piperazine andCoCl2.6H2O. These compounds were characterized by single X-ray diffraction, FTIR, UV-Visible 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.

Keywords

  • Thiocyanate precursor, Metal complexes, Crystal structures

Publication forum classification

Field of science, Statistics Finland