Electrical conductivity of some cobalt (III) complex salts in aqueous medium at 298 K

The conductance of two different symmetrical complexes cobalt(III) tetramine oxalato [Co(3,2,3)tetOx]X and trien carbonato [Co(tn)2 CO3]X ( where X=Cl-,Br-,I-.ClO4 - and PF6 - ), in water are determined at 298 K. The results are analyzed by Fuoss-Onsager model to estimate simultaneously molar infinity of conductance Λo, association constant KA and associated parameter distances of ion pairs R , (all related to standard minimum deviation σΛ). Data are applied to calculate the solvated ionic radii and solvation number, according to Gill’ equation which revealed that solvent separated ion pair (SSIP) model is preferred to these complexes aqueous medium

Author(s): Mohamed SH. Ramadan and Nabila M. El-Mallah

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