Adipic acid yields a cyclic ketone on heating while glutaric and succinic acids yield cyclic anhydrides
The claim is supported by chemical literature and standard organic chemistry principles, noting that adipic acid yields a cyclic ketone upon thermal decomposition while dicarboxylic acids like succinic and glutaric acids form cyclic anhydrides.
Paper [11] explicitly observes cyclopentanone (a cyclic ketone) in the thermal decomposition products of adipic acid upon heating. Standard organic chemistry principles confirm that dicarboxylic acids with four or five carbon backbones (succinic and glutaric acids) readily form stable 5- and 6-membered cyclic anhydrides upon heating.
Johannes Schneider, Andreas P Häring, S. R. Waldvogel. Electrochemical Dehydration of Dicarboxylic Acids to Their Cyclic Anhydrides.. 2024. https://doi.org/10.1002/chem.202400403
Supports the general chemical behavior of dicarboxylic acids forming cyclic structures upon dehydration.
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Sun W, Pinacho P, Obenchain DA, Schnell M. Gas-Phase Characterization of Adipic Acid, 6-Hydroxycaproic Acid, and Their Thermal Decomposition Products by Rotational Spectroscopy.. 2024. https://doi.org/10.1021/acs.jpclett.3c02969
Specifically demonstrates that heating adipic acid yields cyclopentanone (a cyclic ketone) alongside adipic anhydride.
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