reactions were done at 120 °c and were studied by 1h-nmr spectroscopy of the reaction mixture. the forward rate k1 was found to decrease by a factor of 4.5 going from cyclohexane to methanol. the reverse rate k-1 was found to increase by a factor of 53 going from cyclohexane to methanol, while the equilibrium constant keq decreased by a factor of 140. it is suggested that there is a change of the polarity during the activation process as evidenced by relationships between the equilibrium and kinetic data. the authors say that the reaction appears to be influenced by the polarity of the solvent, and this can be shown by the change in the dipole moments when going from reactant to transition state to product. the authors also state that the cheletropic reaction doesn’t seem to be influenced by either solvent acidity or basicity.