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Chemical selectivities disguised by mass diffusion. IV. Mixing-disguised nitrations of aromatic compounds with nitronium salts. 4th communication on the selectivity of chemical processes

✍ Scribed by Felix Nabholz; Paul Rys

Publisher: John Wiley and Sons
Year: 1977
Tongue: German
Weight: 382 KB
Volume: 60
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19770600846

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✦ Synopsis

Abstract

The disguise of the intrinsic selectivity of competitive, consecutive reaction systems by the mixing process is demonstrated experimentally using the fast nitration of a number of aromatic compounds with nitronium salts in nitromethane. The measured product distributions were compared with the distributions predicted from our mixing‐reaction model developed previously [2] [4]. This comparison enabled the relative intrinsic rate constants for the second nitration step of the aromatic compounds investigated to be determined.

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✍ Hasan Belevi; John R. Bourne; Paul Rys 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 German ⚖ 473 KB 👁 1 views

## Abstract In mixing‐disguised azo coupling reactions the protons which are released during the electrophilic substitution steps cause a pH‐gradient in the reaction zone. Since, owing to the acid‐base pre‐equilibria, these pH‐gradients also determine the local concentrations of the reactants in th