correct for this anomaly in the nitrile's 𝜈̅ /𝐹 ⃗ -behavior in Hbonding environments via temperature-dependent experiments, correlations with nuclear magnetic resonance, or molecular dynamics (MD). Recently, we found a new, direct approach to circumvent the issues with nitrile frequencies when we observed that the integrated IR absorption intensity (𝐼 𝐼𝑅 ) of nitriles varies monotonically with the electric field in both aprotic and protic solvents (Fig. ). This additional VSE is explained by the dependence of the transition dipole moment (TDM; 𝑚 ⃗⃗⃗), which governs the IR absorbance, with the electric field according to