Kinetics in Highly Viscous Liquid Phase Realized under High Pressure
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Effect of pressure on the rate of relatively slow thermal Z to E isomerizations was studied in viscous organic liquids. The results clearly demonstrated that the reactions were transferred from the "activation limited" to the "solvent-fluctuation limited" regime by an increase in the solvent viscosity. The viscosity dependence of the observed rate could be analyzed by assuming a two-step mechanism based on the two-dimensional reaction coordinate model proposed by one of the present authors. A recent Biswas-Bagchi prediction of an inverse logarithmic dependence of rate was not born out by our experimental results. A single case of a "multi exponential" decay is also reported.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 1222-1224, 1998
The Japan Society of High Pressure Science and Technology