Acta Cryst. (2005). C61, o477-o482 [ doi:10.1107/S0108270105021888 ]
Abstract: In each of the four title compounds, namely (Z)-5-benzylidene-2-thioxothiazolidin-4-one, C10H7NOS2, (I), which crystallizes with Z' = 2 in space group P21/n, (Z)-5-(4-methylbenzylidene)-2-thioxothiazolidin-4-one, C11H9NOS2, (II), (Z)-2-thioxo-5-[4-(trifluoromethyl)benzylidene]thiazolidin-4-one, C11H6F3NOS2, (III), and (Z)-5-(4-methoxybenzylidene)-2-thioxothiazolidin-4-one, C11H9NO2S2, (IV), there is a very wide C-C-C angle (ca 130°) at the methine C atom linking the two rings. Pairs of N-HO hydrogen bonds link the two independent molecules in (I) into a cyclic dimeric unit, and these units are further linked into complex sheets by three independent C-H(arene) hydrogen bonds. The molecules of (II) are linked by paired N-HO hydrogen bonds into centrosymmetric R22(8) dimers; the molecules of (III) and (IV) are linked into chains of rings, which are constructed from a combination of N-HS and C-HO hydrogen bonds in (III), and from a combination of N-HO and C-HS hydrogen bonds in (IV).
Formula: C10H7NOS2, C11H9NOS2, C11H6F3NOS2 and C11H9NO2S2
Structure factor file (CIF format) (215.6 kbytes)
Structure factor file (CIF format) (120.4 kbytes)
Structure factor file (CIF format) (126.0 kbytes)
Structure factor file (CIF format) (123.6 kbytes)
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