Table 2. Experimental details.
| Crystal data | |
| Chemical formula | C9H10N2O4 |
| M r | 210.19 |
| Crystal system, space group | Monoclinic, P21/n |
| Temperature (K) | 90 |
| a, b, c (Å) | 10.8740 (8), 7.0136 (6), 12.2891 (12) |
| β (°) | 92.313 (5) |
| V (Å3) | 936.48 (14) |
| Z | 4 |
| Radiation type | Cu Kα |
| μ (mm−1) | 1.02 |
| Crystal size (mm) | 0.32 × 0.09 × 0.04 |
| Data collection | |
| Diffractometer | Bruker Kappa APEXII DUO CCD |
| Absorption correction | Multi-scan (TWINABS; Bruker, 2016 ▸) |
| T min, T max | 0.742, 0.961 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 2937, 1675, 1360 |
| R int | 0.047 |
| (sin θ/λ)max (Å−1) | 0.607 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.059, 0.176, 1.08 |
| No. of reflections | 1675 |
| No. of parameters | 160 |
| H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
| Δρmax, Δρmin (e Å−3) | 0.28, −0.35 |