Difference in the Reactions of<i>N</i>-Methylhydroxylamine and<i>N</i>-Phenylhydroxylamine with Nitrosobenzene
作者:Jacir Dal Magro、Rosendo Augusto Yunes
DOI:10.1246/bcsj.71.2381
日期:1998.10
The reaction of nitrosobenzene with N-methylhydroxylamine was studied. The pH-rate profile exhibits a negative break at between pH 0.5 and 3.0, which is considered to be caused by a change in the rate-determining step of the reaction from an attack of the amine on nitrosobenzene at low pH, to the dehydration of an addition intermediate previously formed between the reagents at higher pH. This behavior
研究了亚硝基苯与N-甲基羟胺的反应。pH 速率曲线在 pH 0.5 和 3.0 之间显示出负中断,这被认为是由于反应的速率决定步骤发生了变化,从胺在低 pH 下对亚硝基苯的攻击,到脱水先前在较高 pH 值的试剂之间形成的附加中间体。这种行为不同于 N-苯基羟胺和亚硝基苯之间的反应,在整个 pH 范围内,唯一的速率决定步骤是加成中间体的脱水。这一事实证实了苯羟胺作为亲核试剂的特殊行为,正如在它与芳香醛的反应中所观察到的那样。