2‐nitropropane, with kH/kD (25 °C) = 7.7 and 7.8, respectively. In both the cases, the isotope effects are conventionally temperature dependent. For the corresponding phenols 3, conditions have been established under which the deprotonations of the nitroalkane are dominated by intramolecular deprotonation by the kinetically first‐formed phenolate anion, with an estimated effective molarity EM ∼ 250. For
已确定了由醚1-(2-
甲氧基苯基)-
2-硝基丙烷,7(X = H,L = H和D)和1-(2--2-甲氧基-醚)形成
亚硝酸根阴离子的速率常数和动力学同位素效应5-
硝基苯基)-
2-硝基丙烷7(X = NO 2,L = H和D),相应
酚中的1-(2-羟基苯基)-
2-硝基丙烷3(X = H,L = H和D)和1-(2-羟基-5-
硝基苯基)-
2-硝基丙烷3(X = NO 2,L = H和D)在碱性
水溶液中。对于醚7,氢氧化物的去质子化速率与k-(k H / k D)下的
2-硝基丙烷的去质子化速率相当。(25°C)分别为7.7和7.8。在两种情况下,同位素效应通常取决于温度。对于相应的
酚3,已经建立了条件,在该条件下,硝基烷的去质子化主要由动力学上首先形成的
酚盐阴离子进行分子内去质子化,估计的有效摩尔浓度为
EM〜250。对于3(X = H,L = H或D),k H / k D(25°C)= 7.8,E