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Solid-state decomposition of alkoxyfuroic acids

J T Carstensen, R Kothari

    Journal of Pharmaceutical Sciences
    |October 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

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    Alkoxyfuroic acids were synthesized and their solid-state decomposition studied. Decomposition kinetics followed Arrhenius relationships, with a notable break in correlation for longer alkyl chains, indicating complex thermal behavior.

    Area of Science:

    • Organic Chemistry
    • Physical Chemistry
    • Materials Science

    Background:

    • Solid-state decomposition is crucial for understanding material stability.
    • Alkoxyfuroic acids are a class of compounds with potential applications.
    • Thermal decomposition kinetics provide insights into molecular behavior.

    Purpose of the Study:

    • To synthesize a series of alkoxyfuroic acids with varying alkyl chain lengths (n=8-18).
    • To investigate the solid-state decomposition kinetics of these compounds.
    • To establish correlations between chain length, decomposition rates, and liquefaction points.

    Main Methods:

    • Synthesis of alkoxyfuroic acids.
    • Study of solid-state decomposition using Bawn kinetics.

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  • Determination of solid and liquid decomposition rate constants.
  • Analysis of Arrhenius relationships and liquefaction points.

    • Main Results:

    • Decomposition rate constants followed an Arrhenius relationship, dependent on alkyl chain length.
    • A distinct break in the Arrhenius correlation was observed between chain lengths n=14 and n=16.
    • Liquefaction points correlated well with inverse temperature.
    • The isokinetic temperature (Ti) aligned with trends observed in similar compound series.

    Conclusions:

    • The solid-state decomposition of alkoxyfuroic acids is governed by chain length-dependent Arrhenius kinetics.
    • A structural or intermolecular transition likely occurs around n=14-16, affecting decomposition.
    • The thermal behavior, including liquefaction, is predictable and consistent with established physical chemistry principles.