ISSN:
0894-3230
Keywords:
Organic Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Equilibria and kinetics of acid-base reactions in toluene between a carboxylic acid (m-toluic, salicylic acid) and a set of carbinol bases (derived from basic triarylmethane dyes) were studied spectrophotometrically. The results for the equilibrium and kinetic parameters were critically analysed. The rate constant of the forward step of the acid-carbinol base equilbrium was found to provide a suitable scale of basicities in toluene. The basicities of the dye carbinols chosen decrease in the order Ethyl Violet- 〉Crystal Violet- 〉Methyl Violet- ≈ Victoria Pure Blue BO- ≫ Brilliant Green- 〉Malachite Green-carbinol. This is fairly consistent with the order observed in water. A fairly good correlation between base strengths of the carbinols and σR+ parameters of their para-alkylamino substituents was obtained.
Additional Material:
6 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/poc.610060304
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