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- W2950250917 abstract "Ultraviolet absorption, fluorescence, and excitation spectra of xanthone and its hydroxyl and methoxyl derivatives were measured in sulfuric acid solutions of various acidities. The basicities (pKa’s) of these compounds were obtained from the spectral change. Variable-β type molecular orbital calculations of the π-systems were performed, assignment of the absorption spectra being made. It was confirmed that protonation occurs at the carbonyl oxygen atom. A method for obtaining the equilibrium constant without knowing the absolute intensity is proposed." @default.
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- W2950250917 date "1974-10-01" @default.
- W2950250917 modified "2023-09-25" @default.
- W2950250917 title "ChemInform Abstract: SPECTROSCOPIC AND THEORETICAL STUDIES ON THE PROTONATION TO XANTHONE DERIVATIVES" @default.
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- W2950250917 doi "https://doi.org/10.1002/chin.197439196" @default.
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