Sulfonation of arylamines : Part VII-Kinetics of thermal decomposition of tetramethyldianilinium sulfates
Tetramethyldianilinium sulfates (TMDAS) have been prepared and characterised. Thermal decomposition of these salts has been studied by TO and kinetics evaluated using Prout-Tompkins equation. Activation energies of these salts are found to be linearly related to the pKa of the corresponding amine. It has been found that TMDAS give dimethylaminobenzenesulfonic acids (DMAB-SA) via solid state reaction induced by heat. A reaction scheme representing the thermal decomposition pathways of these salts has been suggested. The proton transfer (unimolecular elementary reaction) seems to be the primary step which is followed by a bimolecular step (sulfonalion) for the decomposition of these salts.
Singh, Gurdip,Kapoor, Inder Pal Singh,Singh, Jyotsna
p. 590 - 595
(2007/10/03)
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