Acta Cryst. (2007). C63, o33-o37 [ doi:10.1107/S0108270106048402 ]
Abstract: The molecules of ethyl 5-amino-1-(4-cyanophenyl)-1H-imidazole-4-carboxylate, C13H12N4O2, are linked into a chain of alternating R22(10) and R44(34) rings by a combination of N-HN and C-HN hydrogen bonds. In ethyl 5-amino-1-(4-chlorophenyl)-1H-imidazole-4-carboxylate, C12H12ClN3O2, where the ethyl group is disordered over two sets of sites, a combination of N-HO, N-HN, C-HN and C-H(arene) hydrogen bonds links the molecules into complex sheets. Two intermolecular hydrogen bonds, one each of N-HN and C-HO types, link the molecules of ethyl 5-amino-1-(2,6-difluorophenyl)-1H-imidazole-4-carboxylate, C12H11F2N3O2, into a continuous three-dimensional framework structure.
Formula: C13H12N4O2, C12H12ClN3O2 and C12H11F2N3O2
Structure factor file (CIF format) (132.0 kbytes)
Structure factor file (CIF format) (140.6 kbytes)
Structure factor file (CIF format) (67.3 kbytes)
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