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Preparation of Diazo Phenyl Sulfides. Kinetics and Mechanism of the Diazo Coupling Reaction of p ‐Nitrobenzenediazo Phenyl Sulfide with β‐Naphthol under Various Conditions
Author(s) -
Sakla Alfy Badie,
Masoud Nabil Khalil,
Sawiris Zaki,
Ebaid Wagih Sadik
Publication year - 1974
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19740570222
Subject(s) - diazo , chemistry , sulfide , thiophenol , kinetics , photochemistry , azo coupling , diazonium compounds , coupling reaction , medicinal chemistry , inorganic chemistry , organic chemistry , catalysis , physics , quantum mechanics
Aryldiazophenyl sulfides prepared from diazotised arylamines and thiophenol at controlled pH, are coupled with β‐naphthol yielding the corresponding azo dye. A kinetic study of the diazo coupling reaction of p ‐nitrobenzenediazo phenyl sulfide with β‐naphthol under various conditions revealed that the reaction is of first order kinetics with respect to the diazo phenyl sulfide, and that the rate of coupling measured colorimetrically is influenced by the hydrogen ion concentration and by the ionising power of the medium.