2,4,6-halogeno-aniline derivatives

The title compounds, 2,4-dibromo-6-chloroaniline, C6H4Br2ClN, (1), N-acetyl -4-bromo-2,6-dichloroaniline (alternative name: 4'-bromo-2',6'-dichloroacet anilide). C8H6BrCl2NO, (2), and N-formyl-4-bromo-2,6-difluoroaniline [alter native name: N - (4-bromo-2,6-difluorophenyl)formamide], C7H4BrF2NO, (3), a ll have at least one short cell axis (in the range 4.2-4.7 Angstrom) and co ntain molecules which are linked to form infinite chains along the short-ax is directions via N-H ... N or N-H ... O hydrogen bonds. Compound(1) has ha logen disorder at the 2 and 6 positions.