Crystal structures of 2-(2-bromo-5-fluoro-phen-yl)-8-eth-oxy-3-nitro-2-thio-chromene and 2-(2-bromo-5-fluoro-phen-yl)-7-meth-oxy-3-nitro-2-thio-chromene.

Two thio-chromene com-pounds containing Br and F atoms, namely 2-(2-bromo-5-fluoro-phen-yl)-8-eth-oxy-3-nitro-2-thio-chromene (CHBrFNOS, ) and 2-(2-bromo-5-fluoro-phen-yl)-7-meth-oxy-3-nitro-2-thio-chromene (CHBrFNOS, ), were prepared the condensation reaction between 2-mer-capto-benzaldehyde and nitro-styrene derivatives. In both com-pounds, the thio-chromene plane is almost perpendicular to the phenyl ring. In the structure of , mol-ecules are assembled π-π stacking and C-H⋯O and C-F⋯π inter-actions. In the crystal packing of , mol-ecules are linked by C-H⋯F, C-H⋯O, C-H⋯π and π-π inter-actions.