"The kinetics and activation parameters of the reaction between p̲, p̲' - dinitrostilbene quantitatively, have been studied in five aqueous dioxane solvent systems at five different temperatures between 20⁰ and 40⁰C. At any one temperature the second-order rate constants are minimum in the 30% dioxane solvent mixture, reach a maximum in the 50% dioxane systems, and fall off slightly in the 60% and 70% dioxane systems. The Arrhenius activation energies are highest in the 30% dioxane and lowest in the 70% dioxane systems. The free energies of activation change in the same direction but the magnitude of change is much less than that for Ea or ΔH*. The greatest variation is shown in the entropies of activation: 14.4 e.u. in the 30% aqueous dioxane solvent mixture and only 2.5 e.u. in the 70% system. The significance of these results is discussed in terms of specific solute-solvent interactions, dielectric constants, and variations in the activities of hydroxide ion with variations in the solvent composition"--Abstract, page vi.
Hanna, Samir B.
Venable, Raymond L., 1935-2008
Hill, Otto H.
M.S. in Chemistry
University of Missouri--Rolla
vi, 71 pages
© 1968 Ken K. Ho, All rights reserved.
Thesis - Open Access
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Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b2135870~S5
Ho, Ken K., "A study of solvent effects on the reaction between p-nitrobenzyl chloride and hydroxide ion in aqueous dioxane homogeneous media" (1968). Masters Theses. 5185.