The antiferromagnetic π contributions in the iron complex are about half as strong as the σ contributions, consistent with BS-DFT orbital overlap calculations. This confirms the expectation that the π x and π y paths are non-negligible. The antiferromagnetic coupling along the δ path remains five orders of magnitude weaker than the σ and π paths, as it was also found for the other examples. With the NEVPT2 approach, the variability of the coupling contributions using the two active space sizes is similar in magnitude as in the nickel complex. The deviations are most pronounced in the (14,11) NEVPT2 calculations for J AF,πy and J AF,δ in the iron complex.