Table 2. Experimental details.
| Crystal data | |
| Chemical formula | C19H11N3C2H2Cl4 |
| M r | 449.14 |
| Crystal system, space group | Monoclinic, C2/c |
| Temperature (K) | 90 |
| a, b, c () | 20.072(7), 14.190(5), 7.079(3) |
| () | 110.255(4) |
| V (3) | 1891.5(11) |
| Z | 4 |
| Radiation type | Mo K |
| (mm1) | 0.64 |
| Crystal size (mm) | 0.79 0.40 0.10 |
| Data collection | |
| Diffractometer | Bruker APEXII CCD area detector |
| Absorption correction | Multi-scan (SADABS; Bruker, 1996 ▸) |
| T min, T max | 0.511, 0.938 |
| No. of measured, independent and observed [F 2 > 2(F 2)] reflections | 4336, 1670, 1606 |
| R int | 0.038 |
| (sin /)max (1) | 0.595 |
| Refinement | |
| R[F 2 > 2(F 2)], wR(F 2), S | 0.030, 0.081, 1.06 |
| No. of reflections | 1670 |
| No. of parameters | 128 |
| H-atom treatment | H-atom parameters constrained |
| max, min (e 3) | 0.50, 0.27 |