calculations show possible structures for the intermediates. The reaction between Br(-) and O(3) is accelerated by H(+) but exhibits a kinetic saturation effect as the acidity increases. The kinetics indicate formation of BrOOO(-) as a steady-state intermediate with an acid-assisted step to give BrOH and O(2). Temperature dependencies of the reactions of Br(-) and HSO(3)(-) with O(3) in acidic solutions are
臭氧与Br(-),SO(3)(2-),HSO(3)(-),I(-)和NO(2)(-)的反应,通过停止流动和脉冲加速-流动技术在O(3)(aq)的浓度中是一阶,在每个阴离子的浓度中是一阶。随着阴离子的亲核性从Br(-)增加到SO(3)(2-),速率常数增加5 x 10(6)。与亲核试剂的
臭氧加合物被提议为稳态
中间体,然后
氧原子转移释放O(2)。从头算计算得出了
中间体的可能结构。H(+)促进了Br(-)和O(3)之间的反应,但是随着酸度的增加,它表现出动力学饱和作用。动力学表明形成BrOOO(-)作为稳态
中间体,并通过酸辅助步骤得到BrOH和O(2)。