in basic solution. With an ionized 4-hydroxy substituent, the hydrogen bond is strong and leads to exceptionally low acidity (pK0 > 16) and to a half-life in the millisecond range for proton removal by hydroxide ion in 95%(v/v) Me2SO–H2O. The results are compared with those for other species in which hydroxy and azo groups are intramolecularly hydrogen-bonded.
在碱性溶液中,研究了分子内氢键对一系列取代的1-苯基偶氮-
2-萘酚离解的速率系数和平衡常数的影响。带有离子化的
4-羟基取代基,氢键牢固,可导致极低的酸度(p K 0 > 16),并且在毫秒范围内的半衰期可被95%(v / v)的氢氧离子去除质子我2 SO-H 2 O的结果与其他物种相比,其中羟基和偶氮基团是分子内氢键键合。