Figure 3: The plot of log ( 𝑘 / 𝑘 𝑜 ) for 4-tolylphenyl chlorothionoformate (6) against 1.63 𝑁 𝑇 + 0.46 𝑌 C l in the twenty pure and binary solvents studied. The points for TFE-H2O and HFIP-H2O are not included in the correlation. They are added to show the extent of their deviation from the correlation.