The P(c 3 ) linkers have markedly different relative reaction energy trends than the P(c 4 ) minimal models, with Reactions 1 and 3 varying almost quadratically with changing bite angle. ∆∆E R1 P(c 3 ) peaks for the 85 • structure and decreases by around 5 kcal/mol as the bite angle is widened or compressed. ∆∆E R2 P(c 3 ) increases by 5.0 kcal/mol before plateauing around 90 • . ∆∆E R3 P(c 3 ) reaches a minimum at 90 • and rapidly increases for smaller bite angles. Figures 12 and S7 in the SI show that the atomic charges do not vary with bite angle for the P(c 3 ) structures, again suggesting that the steric in- fluence of the ligands is likely the main cause of the bite angle dependence.