For 3d transition metal homogeneous catalysts, the metal-oxo formation vs. HAT LFER is known to exhibit strong spin-state dependence. Here, we also observe varying degrees of LFER correlation when the DE(HAT) vs. DE(oxo) data is categorized according to spin state. Considering the high count of LS data points in our dataset, it is unsurprising that in the LS state, these correlations closely align with the overall scaling relations for both metals (Figure and Supporting Information Figure ). In the HS state, however, we see that the strengths of the correlations are reversed wherein Fe catalysts exhibit a moderate correlation between DE(oxo) and DE(HAT) energies (Pearson's R = -0.66) while Ru catalysts exhibit a weak correlation (Pearson's R = -0.39) (Figure and Supporting Information Figure ). This can be attributed to greater difficulty in stabilizing and converging HS states in Ru compared to Fe, which likely introduced more variability in the HS state Ru data. In the IS state, we observe weak correlations for both Fe and Ru catalysts (Pearson's R = -0.26 and -0.40, respectively), with Ru catalysts still demonstrating a stronger correlation relative to Fe catalysts (Figure and Supporting Information Figure ).