inorganic compounds
The structures of [Co(NH3)5NO2]Cl2 and [Co(NH3)5NO2]Br2, were refined at 290 K and at 150 K. For both compounds the same crystal was used for data collection at different temperatures. The data at 290 K are in good agreement with previously published results [Börtin (1968). Acta Chem. Scand. 22, 2890-2898; Cotton & Edwards (1968). Acta Cryst. B24, 474-477; Kubota & Ohba (1992). Acta Cryst. B48, 627-632]. The structures at 150 K are anisotropically distorted as compared with those at 290 K, but the space group and the general structural pattern remain the same.