Looking deeper at the state-wise breakdown, we find that π * shows a strong positive correlation (0.7) for the buried state, and a moderately positive correlation (0.5) for the embedded state, which is relevant as these are the states with the highest total charge transfers onto the nitrogen molecule (Fig. and Table ). The Gutmann Acceptor number, another measure of Lewis acidity strength shows a moderately positive correlation with the nitrogen-lithium interaction energy in line with already established arguments for both the buried (0.66) and embedded states (0.56). That it shows a similarly moderate positive correlation (0.57) with the interaction strength of the adsorbed state means that strong Lewis acids generally affect the adsorption strength of the nitrogen molecule. The difference in correlation behavior with the Kamlet π * parameter may hint at the possibility of using different PD parameters to select for certain states.