| C9H5Cl2N | F(000) = 800 |
| Mr = 198.04 | Dx = 1.608 Mg m−3 |
| Monoclinic, P21/n | Cu Kα radiation, λ = 1.54178 Å |
| Hall symbol: -P 2yn | Cell parameters from 1283 reflections |
| a = 18.2243 (17) Å | θ = 2.9–75.6° |
| b = 3.8253 (5) Å | µ = 6.59 mm−1 |
| c = 23.622 (3) Å | T = 123 K |
| β = 96.61 (1)° | Prism, colorless |
| V = 1635.8 (4) Å3 | 0.35 × 0.23 × 0.16 mm |
| Z = 8 |