A kinetic study of the hydrolysis of crystal violet and some terminal and bridged analogues

Rate constants have been measured for the reaction of hydroxide ions with C rystal Violet, Ethyl Violet, Pyrrolidine Violet and the 2,2'-isopropyl and oxygen bridged analogues of Crystal Violet. The rates of hydrolysis of Ethy l and Pyrrolidine Violets are similar to each other but are slower than Cry stal Violet in accord with the electron releasing nature of the terminal gr oups. Bridging groups also stabilise the dye system. Thermodynamic paramete rs Delta H double dagger and Delta S double dagger have been obtained for e ach dye. (C) 1999 Elsevier Science Ltd. All rights reserved.