Abstract
Three new coordination compounds, [Co 3(DH) 6] · 24H 2O ( I), [Co(DH) 2Tu 2]CF 3SO 3 ( II) and [Co(DH) 2Py 2]CF 3SO 3 ( III) (where DH − = monoanion of dimethylglyoxime, Py = pyridine, Tu = thiourea), were synthesized starting from Co(CF 3SO 3) 2 · 6H 2O as a substrate. The complexes were characterized by X-ray crystallography, spectroscopic methods (IR, UV–Vis, 1H and 13C NMR, MS) and magnetochemistry. Compound I is a neutral, C 3 i symmetrical, trinuclear Co(II) complex with two tris-{Co 2+(μ-DH) 3} units connected to the central Co(II) ion via bridging oxygen atoms, saturating the Co(II) octahedral coordination. In the case of II and III, the complex cations have the usual trans-octahedral configuration with two DH-chelating units in the equatorial plane of the Co(III) ion and the apical coordination sites occupied by two neutral monodentate ligands (Py or Tu).
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