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Title: Influence of anthraquinone scaffold on E/Z isomer distribution of two thiosemicarbazone derivatives. 2D NMR and DFT studies
Authors: Marković, Violeta
Joksović, Milan
Markovic, Svetlana
Jakovljević, Ivan
Issue Date: 2014
Abstract: A distribution of possible isomeric and tautomeric forms of two tautomerizable anthraquinone-thiosemicarbazones with pronounced cytotoxic potential was investigated using 2D NMR and DFT studies. Conformational analysis of the E and Z isomers of both thiosemicarbazones was performed to find out the most stable conformation for each molecule. It was found that superior stability of E-isomers results from ten-membered intramolecular hydrogen bond between thiosemicarbazone N2H and anthraquinone carbonyl group. This hydrogen bond is stronger than that between thiosemicarbazone N2H and ester oxygen, owing to the large partial negative charge on the anthraquinone oxygen. © 2013 Elsevier B.V. All rights reserved.
Type: article
DOI: 10.1016/j.molstruc.2013.11.025
ISSN: 0022-2860
SCOPUS: 2-s2.0-84889643036
Appears in Collections:Faculty of Science, Kragujevac

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