期刊
TETRAHEDRON
卷 76, 期 42, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2020.131514
关键词
Benzopyrylium derivatives; Acid-base properties; Ionization constants; Tristimulus colorimetry; UV VIS spectrophotometry; DFT calculations
This study describes the synthesis of 6,7-dihydroxy-4-methyl-2-phenylbenzopyrylium perchlorate halogen derivatives and its spectroscopic and theoretical studies. The compounds were characterized by NMR, XRD, IR-spectroscopy and mass-spectrometry methods. The acid-base properties of obtained compounds were investigated by UV VIS spectrophotometric and tristimulus colorimetric methods. The most probable protonation/deprotonation schemes were theoretically determined for studied unsubstituted and halogen derivatives of 6,7-dihydroxy-4-methyl-2-phenylbenzopyrylium perchlorate using DFT calculations. (C) 2020 Elsevier Ltd. All rights reserved.
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