Abstract:The protonation constants of the amino nitrogens of some substituted 1,2,4,5-oxadiazaboroles have been determined
in acetic acid by means of potentiometric titration with perchloric acid. pK
a values of the title compounds were
interpreted on the basis of structural effects due to the substituents and the main skeleton by plotting pK
BH
+ value
versus Hammett constants. Good correlations between pK
BH
+, σ constants, and δC
N and δNH values were also
obtained.
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