Table 4. Differences in the dipole moments of the constituent cations, Δp cation, and anions, Δp anion, of the ionic liquid mixture series 1–11 (units debye, D). Values in parentheses refer to Δp values when a less predominant or higher energy ion conformation is employed.
Ionic liquid mixture series | Δp cation | Δp anion |
1 [C4C1im]Cl[OTf] | — | 4.11 |
2 [C4C1im][MeSO4][Me2PO4] | — | 1.36 (0.89) (1.16) |
3 [C4C1im][OTf][NTf2] | — | 3.91 (0.21) |
4 [C4C1im][(HOC2)3C1N][MeSO4] | 4.21 (1.07) | — |
5 [C4C1im][MeSO4][NTf2] | — | 0.25 (3.87) |
6 [C4C1pyrr][NTf2][Me2PO4] | — | 1.11 (5.23) (0.64) |
7 [C4C1im][NTf2][Me2PO4] | — | 1.11 (5.23) (0.64) |
8 [C4C1im][Me-DBU][MeSO4] | 3.64 | — |
9 [C4C1im][C1C1C1pz][OTf] | 3.26 | — |
10 [C4C1im][Me-DBU][MeSO4][NTf2] | 3.64 | 0.25 (3.87) |
11 [C4C1im][C4C1pyrr][OTf][NTf2] | 2.61 | 3.91 (0.21) |