Solid-state decomposition of alkoxyfuroic acids

✍ Scribed by J. T. Carstensen; Rohit Kothari

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 552 KB
• Volume: 70
• Category: Article
• ISSN: 0022-3549
• DOI: 10.1002/jps.2600701002

✦ Synopsis

A series of alkoxyfuroic acids with alkyl lengths of n = 8-18 was synthesized, and the solid-state decomposition was studied. Bawn kinetics were adhered to, and the solid and liquid decomposition rate constants were established; they followed an Arrhenius relationship well, with energy of activations and preexponential factors being a function of the chain length. There was a break in this correlation between n = 14 and n = 16. The liquefaction points were of the expected correlation with inverse temperature. The isokinetic temperature (Ti) fell fairly well on the line demonstrated for other compound series.

Keyphrases Solid-state decomposition-alkoxyfuroic acids with alkyl chain lengths of n = 8-18 0 Alkoxyfuroic acids-Arrhenius relationship, energy of activation and preexponential factors as a function of chain length 0 Bawn kinetics-solid and liquid decomposition rate constanta of alkoxyfuroic acids Chemical decomposition of pure solids has been discussed sporadically in the literature, the principal publications being those of Prout and Tompkins (1) and Bawn (2). The reactions are usually dictated to a great extent by physical (e.g., active site propagation) rather than chemical steps, resulting in high activation energies (300-400 kJ) when the reaction is one where: solidsolid + gas Scheme I This reaction (Scheme I) was essentially covered by Prout and Tompkins, whereas the reaction (Scheme 11) treated by Bawn is: solid -+ liquid + gas Scheme II Scheme V