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Activation Energy and NBO Interaction Approaches to the Determination of the Relative Resonance Acceptor Strengths of CN, NO, COMe, CHO and NO2 Groups from the Ring-Opening of 1,2-Benzo-3-Carbomethoxycyclobutenes

preprint
submitted on 06.06.2019 and posted on 07.06.2019 by Veejendra Yadav, Arpita Yadav

The relative resonance-acceptor ability based on the activation energies for the outward ring-openings of 1,2-benzo-3-carbomethoxycyclobutenes bearing CN, NO, COMe, CHO and NO2 as C6 and C7 substituents is different from that based on the sC3C4-p*C1C2 interactions in the inward opening transition structures. The differential activation energy (∆G) predicts outward ring-opening and, in contrast, the differential sC3C4-p*C1C2 interaction energy predicts inward opening, throughout. The relative resonance-acceptor ability estimated from the sC3C4-p*C1C2 interaction energies is more realistic than that from the activation energies.

History

Email Address of Submitting Author

vijendra@iitk.ac.in

Institution

Indian Institute of Technology Kanpur

Country

India

ORCID For Submitting Author

0000-0001-8294-0677

Declaration of Conflict of Interest

The authors declare no competing financial interest.

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