Ponderal Substitutent Effect on the Solubility of an Octahedral Metal Complexes and its Quantative Correletion

Abstract

Solubilities of the cobalt(III) complex, CO[(NH₃)₅Cl]CI₂ were

determined in alcohol-water mixtures of lower aliphatic alcohols.

The solubility was found to decrease steadily with increasing alkyl

substitution in the alcohol. This is attributed to the ponderal effect

of the alkyl groups. As expected for ponderal effect, the logarithm

of relative solubilities determined by two different methods gives

good linear correlation with log (1/μ) where  'μ' is the reduced

molecular weight of solvent and solute.