Interactions of 1,2,3,5- and 1,2,4,5-tetranitrobenzene with some nucleophiles in protic solvents
作者:M. R. Crampton、M. El Ghariani
DOI:10.1039/j29700000391
日期:——
measurements, to result from covalent addition of the nucleophile at a hydrogen-carrying ring carbon. The equilibrium constant for the formation of the hydroxide adduct has the value 2·4 × 104 l. mole–1. The solutions are not stable and replacement of the nitro-group at C-2 occurs quickly. The rate constants have been measured. In contrast 1,2,4,5-tetranitrobenzene reacts with hydroxide to give 2,4,5-trinitrophenol
在水中存在氢氧根离子或亚硫酸根离子,或在乙醇中存在乙醇离子的情况下,1,2,3,5-四硝基苯生成红色络合物,根据1 H nmr测量结果,该络合物是由亲核体在1h处共价添加而形成的。载氢环碳。形成氢氧化物加合物的平衡常数值为2·4×10 4 l。摩尔–1。溶液不稳定,并且C-2处的硝基取代很快发生。已经测量了速率常数。相反,1,2,4,5-四硝基苯与氢氧化物反应生成2,4,5-三硝基苯酚而不会产生颜色。用乙醇酸根离子或亚硫酸根离子产生了有色物质,其结构得到了讨论。