MECHANISTIC STUDIES IN STRONG ACIDS .1. GENERAL CONSIDERATIONS - CATALYSIS BY INDIVIDUAL ACID SPECIES IN SULFURIC-ACID
MECHANISTIC STUDIES IN STRONG ACIDS .1. GENERAL CONSIDERATIONS - CATALYSIS BY INDIVIDUAL ACID SPECIES IN SULFURIC-ACID
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DOI：
10.1021/ja00811a018
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发表时间：
1974-01-01
影响因子：
15
通讯作者：
COX, RA
中科院分区：
文献类型：
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作者：
COX, RA
一般的酸催化应在浓硫酸中观察到的条件下被认为是。对存在于该介质中的各个物种的对数活性或浓度的检查，相对于-H 0作图，得出结论，在某些反应中，特别是在80%H2SO4以上，HSO 4而不是H2O应该作为亲核试剂或碱。作为一般酸催化的实例，通过对数速率对对数物种活性相关性，氧化偶氮苯重排为对羟基偶氮苯显示出被酸物种H2SO 4和H3 SO 4+催化，但不被H3 O+催化。
The conditions under which general acid catalysis should be observable in concentrated sulfuric acid are considered. An examination of the log activities or concentrations of the individual species present in thismedium, plotted against— H0, leads to theconclusion that HSOr rather than H20 should act as a nucleophile or base in some reactions, especially above 80% H2S04. As an example of general acid catalysis, the rearrangement of azoxybenzene to p-hydroxyazobenzene is shown to be catalyzed by the acid species H2S04 and H3S04+, but nor H30+, by log rate vs. log species activity correlations.