Free energy of transfer of cobalt(III) complexes from water into water—t-butyl alcohol mixtures |
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| Authors: | Grahame S Groves Cecil F Wells |
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| Institution: | (1) Department of Chemistry, University of Birmingham, Edgbaston, P.O. Box 363, B15 2TT Birmingham, UK |
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| Abstract: | The solubility of trans-(Coen2Cl2)2ReCl6 has been determined in water and in water +t-butyl alcohol mixtures. By comparzng these values with the solubility of Cs2ReCl6 in similar mixtures, values for the difference in free energy of transfer,  G
t
o
(i) between water and water + t-butyl alcohol can be calculated for i =Coen2Cl2]+ and Cs+. The introduction of G
t
o
(Cs+) then produces values for G
t
o
(Coen2Cl2
+). The difference in G
t
o
(i) for i=Coon2Cl]2+ in the transition state and i=Coen2Cl2]+ in the initiad' tate for the solvolysis of the trans-Coen2Cl2]+ ion in water + t-butyl alcohol can be derived from the application of a free energy cycle: using G
t
o
(Coen2Cl2
+) determined from the solubility measurements allows the calculation of values for G
t
o
(Coen2Cl2+). G
t
o
(i) in water + t-butyl alcohol for bis (1,2-diamino) cobalt (III) ions are compared with G
t
o
(i) for tetrapyridinecobalt (III) ions. |
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| Keywords: | Solubility ions free energy of transfer spectrophotometry t-butyl alcohol chlorobis (1 2-diaminoethane) cobalt(III) |
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