Trans-bis(dimethylglyoximato) cobalt(III) complexes containing imidazole and thiocyanate as axial ligands |
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| Authors: | Jayanta K. Das Kailash C. Dash |
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| Affiliation: | Department of Chemistry, Utkal University, Vani Vihar, Bhubaneswar, 751004, India |
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| Abstract: | Imidazole(Im), benzimidazole(BzIm), morpholine (Morph) and their derivatives react with Co(CNS)2 and dimethylglyoxime(DH2) in ethanolic medium in presence of air to form a number of new cobalt(III) complexes of the type trans-[Co(DH)2(L)(SCN)], which are characterised on the basis of electronic and IR spectra, NMR (1H and 13C) and mass spectra as well as thermogravimetric (TG-DTA) and conductance measurements. The thiocyanate groups are S-bonded. The NMR observations suggest that in solution these compounds exist as mixtures of the neutral species [Co(DH)2(L)(SCN)] and the salt [Co(DH)2(SCN)2]? [Co(DH)2(L)2]+. The mass spectra does not show the molecular ion peak of the complex. The TG-DTA measurements show that the thermolysis of these complexes proceeds through polymeric intermediates giving CO3O4 as the end product. |
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| Keywords: | Author to whom correspondence should be addressed. |
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