From the Tables ) are generally small (E(2) n → σ* < 2 kcal/mol) for the individual E (2) n→σ*, E (2) n→ 𝜋* C=C and/or E (2) n→π* N-C interactions. The [EMI] + cation and [FSI] -anions tend to form multiple σ* and 𝜋* interactions, but reducing the strength of the individual contributions from a potential (linear) maximum. The relative contribution from each of these is not easily resolved via the association energy which includes the ionic as well as a combined H-bond contribution.