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Twenty-two 2,4-dinitroanilines were synthesised and their pKa values were determined. The 2,4-dinitroanilines and their protonated forms were studied by 15N NMR spectroscopy. The relations between the 15N NMR chemical shifts and the pKa values of the 2,4-dinitroanilines and their salts were found to be linear. The deprotonation reaction of N-methyl-2,4-dinitroanilines and N-methyl-2,4,6-trinitroaniline...
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