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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 324Spectrophotometric Study of Cobalt (II)...

Spectrophotometric Study of Cobalt (II) Chlorocomplexes in Methanol in the Visible Domain

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Abstract:

Cobalt(II) chlorocomplexes were studied in a polar protic solvent namely methanol at 25°C. The spectrophotometric technique in the visible region was used. The studied equilibrium is: Co²⁺ + j Cl^- CoCl_j ↔ ^(j-2)-. Formation of three chlorocomplexes and a structural modification (Oh → Td) were obtained from recorded spectra analysis. The stability of CoCl⁺ was studied by the graphical method of Kruh and the overall stability constants were calculated with the SIRKO program based on the least-square method. Different models were tested and the model was retained for which the best values are: log β1 = 0.92, log β2 = 1.31 and log β3 = 1.08.

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Periodical:

Advanced Materials Research (Volume 324)

Pages:

170-173

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.324.170

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Online since:

August 2011

Authors:

Soumia Boulefred, Abdelghani Chiboub Fellah, Fatema Zohra Chiboub-Fellah, Mustayeen Ahmed Khan

Keywords:

Cobalt(II) Chlorocomplexes, Spectrophotometry, Stability Constant β_J, Structural Modifications O_H → T_D

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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