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Waterlogged molecules.

R Wolfenden

    Science (New York, N.Y.)
    |December 9, 1983
    PubMed
    Summary

    Organic compounds exhibit varied hydrophilic characters in aqueous solutions, impacting biological processes. Special interactions between molecules and water influence solvation free energy, crucial for metabolic transformations and protein structures.

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    Area of Science:

    • Physical Chemistry
    • Biochemistry
    • Chemical Thermodynamics

    Background:

    • Organic compounds display diverse hydrophilic properties in water.
    • Solvation plays a critical role in biochemical reactions and molecular structures.
    • Understanding molecular interactions in aqueous environments is key to biological processes.

    Purpose of the Study:

    • To investigate the hydrophilic character of organic compounds in aqueous solutions.
    • To explore the influence of solvation on free energy changes in metabolic transformations.
    • To examine the structural equilibria of proteins and large molecules in water.

    Main Methods:

    • Vapor pressure measurements of organic compounds in aqueous solutions.
    • Analysis of solvation free energy changes.
    • Assessment of additivity of functional group effects on solvation.

    Main Results:

    • Profound differences in hydrophilic character among organic compounds were observed.
    • Solvation effects significantly influence metabolic transformations and protein structural equilibria.
    • Non-additive effects indicate special interactions between solute molecules and surrounding water.

    Conclusions:

    • Hydrophilic character and solvation are fundamental to understanding molecular behavior in water.
    • Deviations from additivity highlight complex solute-solvent interactions.
    • These principles are applicable to biological intermediates and transformations.

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