The Absolute Rate of Reactions in Condensed Phases

Abstract

The theory of absolute reaction rates is developed for condensed phases. The equation for the rate of a reaction of any order in any phase where the slow process is the passage over an energy barrier consists of the product of a transmission coefficient κ, a frequency kT/h, an equilibrium constant between an activated complex and the reactants and an activity coefficient factor. Previous theories of reaction rates such as Brönsted's, the collision theory of Mc C. Lewis, etc., are seen to be special cases of the general theory. A variety of examples are considered.

Solvent Effect on the Enthalpy and Entropy of Activation for the Hydrolysis of Ethyl Cinnamate in Mixed Solvent System

“…These thermodynamics Activation parameter has been calculated with help of Wyne-Jones Eyring [6] equation and absolute rate theory [7] and placed in Tab-III.…”

Studies of Solvent Effect of Aquo-Methanol Solvent System on Kinetics and Activation Parameters of Base Catalised Hydrolysis of Ethyl Cinnamate

“…These parameters are calculated using Wynne-jones [6] and Eyring equation have been recorded in Table-II In order to highlight the effect of solvent on these activation parameters, the value of these parameters were plotted against mole% of methanol which is shown in figure 1, 2 &3.…”

Development of Predictive Models of the Kinetics of a Hydrogen Abstraction Reaction Combining Quantum-Mechanical Calculations and Experimental Data

“…the ideal-gas reaction rate constant k IG may be computed using conventional transition state theory 40,41,63 (CTST) following…”