Table presents the thermodynamics of the 1,2-sulphide shift transition state (TS) with different alkene substituent sets during the activation and first cross-metathesis cycle. Similar to the crossmetathesis reaction discussed earlier, the disparities between both systems are in general small. However, two notable distinctions emerge in the following scenarios: when an ethylene molecule coordinates with a 14-e -methylidene complex (E), the 1,2-sulphide shift occurs more rapidly with the benchmark Ru2 compared to the new system Ru3. Another case where these two systems exhibit different behaviour involves the coordination intermediate comprising of methylidene and allylbenzene (F). In this instance, the kinetics favour the deactivation of Ru2 by approximately 5 kcal/mol.