Table 2. Experimental details.
| Crystal data | |
| Chemical formula | C8H20N+·C13H11N2O5S− |
| M r | 437.55 |
| Crystal system, space group | Monoclinic, P21/c |
| Temperature (K) | 291 |
| a, b, c (Å) | 11.0276 (10), 10.7661 (8), 19.635 (2) |
| β (°) | 91.792 (9) |
| V (Å3) | 2330.0 (4) |
| Z | 4 |
| Radiation type | Mo Kα |
| μ (mm−1) | 0.17 |
| Crystal size (mm) | 0.42 × 0.20 × 0.09 |
| Data collection | |
| Diffractometer | Oxford Diffraction Ruby CCD |
| Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2008 ▸). |
| T min, T max | 0.966, 0.998 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 15531, 4094, 2549 |
| R int | 0.073 |
| (sin θ/λ)max (Å−1) | 0.595 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.066, 0.128, 1.10 |
| No. of reflections | 4094 |
| No. of parameters | 276 |
| H-atom treatment | H-atom parameters constrained |
| Δρmax, Δρmin (e Å−3) | 0.16, −0.23 |