Trialkyl aluminum compounds have been in commercial use for some time, and their reactions with simple alkenes have been studied in detail. In this paper, we present kinetic data at 95, 140, 150, and 160 °C for the neat liquid-phase reactions of tri-n-octyl aluminum and 1-dodecene, showing the emergence of octene, hexadecene, eicosene, and docosene isomers, as well as the isomerization of octenes and dodecenes. We used a comprehensive kinetic model and data from eight experiments to calculate four rate constants and one key equilibrium constant for the system. In addition, we estimated relative rates for a number of other fast reactions in the system and obtained sets of rate constants that accurately reproduced our kinetic data at each temperature. These results permitted us to calculate Arrhenius parameters for the system and therefore predict reaction rates for each reaction in this complex system across a broad range of temperatures and reactant concentrations.