Solvation of copper (I) perchlorate in benzonitrile + pyridine mixtures investigated by conductance studies

Abstract

Molar conductances of Bu₄NBPh₄ , <span style="font-size:14.0pt;font-family:HiddenHorzOCR;mso-bidi-font-family: HiddenHorzOCR">Bu₄<span style="font-size:14.0pt;font-family:HiddenHorzOCR;mso-bidi-font-family:HiddenHorzOCR">NCIO₄<span style="font-size:14.0pt; font-family:HiddenHorzOCR;mso-bidi-font-family:HiddenHorzOCR"> and CuClO₄ have been measured in the concentration range (1-175) x 10^-4 mol dm^-1 at 298.15, 308.15 and 318.15 K in benzonitrile + pyridine mixtures containing 0, 20, 40, 60, 80 and 100 mol % benzonitrile. The conductance data have been analyzed by the Shedlovsky equation to obtain Λ_ovalues of the electrolytes. Limiting ion conductances (λ_i^o) and solvated radii (r_i) for Cu⁺ and ClO₄^- have been evaluated. The results show that Cu⁺ is strongly solvated both in benzonitrile and pyridine but the solvation decreases in the binary mixtures due to a strong competition between benzonitrile and pyridine molecules.

<span style="font-size:14.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">ClO^-₄ has a poor solvation in benzonitrile, pyridine as well as in benzonitrile <span style="font-size:14.0pt;font-family:Arial;mso-fareast-font-family:" times="" new="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">+ <span style="font-size:14.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">pyridine mixtures.</span></span></span></span></span></span>