theoretical study of the intramolecular proton transfer and calculation of the nucleus independent chemical shift in juglone and some of its derivatives

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ID: 223302
2011
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Abstract
In the present study, first, the intramolecular proton transfer (IPT) process of juglone and its derivatives were theoretically investigated in the gas phase and the effect of electron-withdrawing and electron-releasing substituents in different positions of the phenyl and benzoquinone rings of juglone on the IPT process was studied in which the geometries, energies and thermodynamic functions of the compounds were obtained using density functional theory (DFT) calculations at the B3LYP/6-31+G(2d,p) level. Next, the influence of IPT on changing the aromaticity of the phenyl and benzoquinone rings was investigated. To determine the aromaticity of the rings, nuclear independent chemical shift (NICS) values were calculated for the ground state and transition state structures (GS1, TS and GS2) using the continues set of gauge transformations (CSGT) procedure at the B3LYP/6-311+G(2d,p) level.
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vessally2011journaltheoretical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;ESMAIL VESSALLY;EHSAN FEREYDUNI;MAHDI KAMAEE;SHAHRAM MORADI
Journal meditsinskaia radiologiia
Year 2011
DOI
DOI not found
URL
http://www.shd.org.rs/JSCS/Vol76/No6/08_4895_4168.pdf
Keywords
chemistry DFT aromaticity intramolecular proton transfer

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