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Reactivity of Dichloro‐ and Trichloropyrimidyl Dyes and the Sensitivity of their Dyeings to Hydrolysis
Author(s) -
Thumm O.,
Benz J.
Publication year - 1962
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.196205681
Subject(s) - reactivity (psychology) , chemistry , chromophore , hydrolysis , reactive dye , cellulose , alkaline hydrolysis , organic chemistry , dyeing , medicine , alternative medicine , pathology
Several examples are used to show that the reactivity of dichloro‐ and trichloropyrimidyl dyes and the sensitivity of their dyeings to hydrolysis are determined by the nature of the bridge unit between the chromophore and the reactive system. The tendency of the dyeings to hydrolyze in acid and, more particularly, in alkaline media increases with increasing reactivity of the dyes. In alkaline media, dyeings made with dyes containing oxygen bridges are cleaved mainly between the reactive system and the chromophore, while in dyeings made with dyes containing imino or methylimino bridges, the linkage between the reactive system and the cellulose is hydrolyzed.