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- W2077892246 abstract "Ionisation constants at 20° and the ionic strength μ = 0,1 were determined for some substituted benzoic acids, some substituted anilines, and for m- and p-phenylendiamines. ϱ values for the benzoic acids and anilines series are calculated. σ values for NH2 and NH3+ are derived from the data for the phenylendiamines, and they are discussed in comparison with values obtained from other reactions. By application of Hammett's rule, partial ionisation constants for zwitterion and uncharged amino acid forms of aromatic amino acids are calculated. These data combined with experimental pK values (reported in earlier papers) lead to information on the constants for the tautomeric equilibria : zwitterions ⇌ uncharged amino acid. This method is applied for m- and p-aminobenzoic acids and for p-amino-salicylic acid." @default.
- W2077892246 created "2016-06-24" @default.
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- W2077892246 date "1956-01-01" @default.
- W2077892246 modified "2023-10-17" @default.
- W2077892246 title "DieHammett'schen ?-Werte der Gruppen ?NH2 und ?NH3+. Zwitterionen-Bildungsgleichgewichte in L�sungen aromatischer Aminos�uren" @default.
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- W2077892246 doi "https://doi.org/10.1002/hlca.19560390134" @default.
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