Two new cobalt(III)-chelates, trans-bis(methyl-ethyl-dioximato)-chloro- β-picoline-cobalt (III) (1), and trans-bis(methyl-ethyl-dioximato)-chloro- 3,4-lutidine-cobalt (III) (2) were obtained by oxidizing a mixture of CoCl 2, methyl-ethyl-dioxime and amines: β-picoline (3-methyl-pyridine) for (1) and 3,4-lutidine (3,4-dimethyl-pyridine) for (2). The crystal structure of (1) was determined by single crystal XRD (monoclinic, space group P21/c (No. 14) with a = 8.391(3) Å, b = 14.421(5) Å, c = 18.383(8) Å, β = 114.57(2)°, R = 0.0499), while both (1) and (2) were studied by middle and far FTIR spectroscopy, electrospray ionization (ESI) MS, powder XRD and thermal analysis (TG/DTA-MS). Melting of the related complexes 1 and 2 at 219 and 184 °C, respectively, results in an immediate chemical degradation of their whole structure and tarring of ligands.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry