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Tunneling Governs Intramolecular Proton Transfer in Thiotropolone at Room Temperature

Authors

  • Deepthi Jose,

    1. School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala—695016 (India)
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  • Prof. Dr. Ayan Datta

    Corresponding author
    1. School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala—695016 (India)
    2. Current address: Department of Spectroscopy, Indian Association for the Cultivation of Science, Kolkata, West Bengal—700032 (India)
    • School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala—695016 (India)
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  • D.J. thanks the CSIR India for a junior research fellowship. A.D. thanks the DST and the CSIR for partial funding.

Abstract

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Successfully tunneled: The rapid and temperature-independent intramolecular proton transfer in thiotropolone occurs entirely through quantum mechanical tunneling (see picture). For tropolone, tunneling across a smaller yet broader barrier leads to a slower rate of proton transfer for temperatures smaller than 240 K.

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