Thermal and structural characterization of copper(II) complexes with phenyl-2-pyridylketoxime (HPPK)

• Published in: Journal of thermal analysis and calorimetry Vol. 128; no. 3; pp. 1591 - 1599
• Main Authors: Szczęsny, R., Szłyk, E., Kozakiewicz, A., Dobrzańska, L.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.06.2017; Springer Nature B.V
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Crystal structure; Infrared spectroscopy; Inorganic Chemistry; Ligands; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Thermal decomposition; Thermodynamic properties; Phenyl-2-pyridylketoxime; Thermal properties; Cu(II) complexes; SCXRD
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-016-5956-y

Copper(II) complexes of different nuclearity with phenyl-2-pyridylketoxime (HPPK), such as mononuclear [Cu(HPPK)(PPK)X], whereby X  = NCS − (1) or NO 3 − (2) , dinuclear [Cu(HPPK)Cl 2 ] 2 (3) and trinuclear [Cu 3 (PPK) 3 (μ 3 –OH)(Cl) 2 ]· n H 2 O (4) were synthesized, and their thermal properties were investigated. The studies involved gas-phase monitoring of decomposition products by infrared spectroscopy. Thermal decomposition performed in air revealed the multi-stage character of the process, the course of which depends on the compound composition. In all cases, CuO was found as the final product of the process. Furthermore, the crystal structure of 1 was revealed. It shows a square-pyramidal geometry around Cu(II), with the NCS − ion situated in the apical position and two HPPK ligands present in the base, one of which is deprotonated.