The recently developed YARP methodology was used to enumerate the reactions and characterize the transitions states associated with the Ga-ethyl species modeled in the presence of excess ethylene. For a more detailed description of the YARP methodology we direct readers to our previous publication. In the following sections we focus on the modifications that were implemented to the reaction enumeration and reaction pathway construction steps to adapt YARP to explore ethylene oligomerization on single-site Ga 3+ /SiO 2 .