Potentiometric Study of Acid−Base Equilibria of 3,5-Disubstituted 1,2,4,5-Oxadiazaboroles in Nonaqueous Media
作者:Yaşar Dürüst、Nedime Dürüst、Muharrem Akcan
DOI:10.1021/je0604683
日期:2007.5.1
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. pKa values of the title compounds were interpreted on the basis of structural effects due to the substituents and the main skeleton by plotting pKBH+ value versus Hammett constants. Good correlations between pKBH+
某些取代的1,2,4,5-恶二氮杂硼烷的氨基氮的质子化常数已在乙酸中通过高氯酸的电位滴定法测定。通过将p K BH +值对Hammett常数作图,根据取代基和主骨架的结构效应来解释标题化合物的p K a值。P的良好的相关性ķ BH +,σ常数,δ Ç Ñ和δ NH还获得的值。