Abstract
Effects of different organic solvents on the extent of complex formation in binary aqueous organic solvent mixtures were studied by means of spectrophotometry, spectropolarimetry, and solubility technique. In every instance, the stability constants of the complexes decreased as the ratio of organic solvent to water increased. The complexes were much less stable in aqueous dioxane mixtures than in similar mixtures of water and polyhydroxy compounds such as glycerin and sucrose. These studies strongly indicate the significant contribution made by hydrophobic bonding to these interactions and the major role of the water structure.
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