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Coordination States and Apparent Molar Volumes of Cobalt(II) Perchlorate and Cobalt(II) Chloride in N, N'-Diethylacetamide Solutions at 25 graduate C

Lipski P., Pastewski R., Grzybkowski W.

Polish Journal of Chemistry

2005

Vol. 79 / nr 9

1445-1459

Visible absorption spectra and apparent molar volumes for CoCl2 and Co(ClO4)2 in N,N-diethylacetamide (DEA) as well as the spectra for the Co(ClO4)2 - CoCl2 - DEAand CoCl2- LiCl - DEA systems were studied. The results indicate formation of the electrically neutral CoCl2(DEA)2 complex, being the predominating chloro-complex of cobalt(II) in the solutions of CoCl2 in DEA. The formation constants of the consecutive chloro-complexes of cobalt(II) have been determined: logK1 = 5.28(+-0.10), logK2 =+ - 6.10(_0.08), logK3 = 3.31(+ - 0.05) and logK4 = 0.74(+ - 0.05).