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
P2
1/
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.
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