Thermodynamic parameters ΔΔH# and ΔΔS# as probes for the transition state in the reaction of N-phenyltriazolinedione with alkenes in nucleophilic solvents

The thermodynamic parameters, ΔΔH# and ΔΔS#, were determined for the interception of an intermediate, with the structural characteristics of an aziridinium imide, by nucleophilic solvents during the reaction of 2-methyl-2-butene with N-phenyltriazolinedione. The experimentally measured parameters were found to be in favor of an SN2-‘like’ transition state and showed strong dependence on the bulkiness of the incoming molecule of the nucleophile-solvent.