THE SOLUBILITY OF COORDINATION COMPOUNDS RELATIONSHIP TO COMPOSITION AND STRUCTURE

The study of preparative coordination chemistry necessitates an understanding of the factors governing the solubilities of metal complexes in water and non-aqueous solvents. However, a rigorous dieory of the solubility of chemical compounds has not been devised as yet. Even when the solubilities of analogous materials are known, it remains extremely difficult to predict the solubility of a given substance. Semiempirical approadies to the pr iction of solubilities appear in the literature. In particular, the theory of Hildebrand and Scott,5a which relates solubility to the energy of vaporization and the molar volume of a solute, is effective for nonelectrolytes. There are also approaches in which solubility is related to the melting point of the solute or the polarity / of die solvent. Nonetheless, most chemists still use the rule of thumb that like dissolves like. [Pg.35]

In general, the solubility of a substance is determined by the relationship between its crystal-lattice energy and its energy of solvation in a particular solvent. Table 2.1 illustrates the influence of crystal lattice energies, hydration enthalpies, and hydration entropies on solubilities with values obtained by quantitative measurements of saturated solutions at known temperatures. [Pg.35]

Crystal lattice energies, hydration enthalpies, hydration entropies, and solubilities of some compounds [Pg.35]

Compound U (kj/mol) Hhyd (kJ/mol) Shyd (J/molK) Sol (291K) (g/lOOg) [Pg.35]

In preparative chemistry there are a number of principles by which predictions of solubility may be linked to the composition and structure of a [Pg.35]

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