Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 1 (January 2002)

Acta Cryst. (2002). C58, o39-o41 [doi:10.1107/S0108270101018765]

Supramolecular structures of 5-[3-(4-methylphenyl)- and 5-[3-(4-chlorophenyl)-2-propenylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione

J. N. Low, J. Cobo, M. Nogueras, A. Sánchez, B. Insuasty and H. Torres

Abstract: 2,2-Dimethyl-5-[3-(4-methylphenyl)-2-propenylidene]-1,3-dioxane-4,6-dione, C₁₆H₁₆O₄, crystallizes in the triclinic space group $P\overline 1$ , with two molecules in the asymmetric unit. These molecules and a centrosymmetrically related pair, linked together by weak C-HO hydrogen bonds, form a tetramer. 5-[3-(4-Chlorophenyl)-2-propenylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione, C₁₅H₁₃ClO₄, also crystallizes in the triclinic space group $P\overline 1$ , with one molecule in the asymmetric unit. Centrosymmetrically related molecules are linked together by weak C-HO hydrogen bonds to form dimers which are further linked by yet another pair of centrosymmetrically related C-HO hydrogen bonds to form a tube which runs parallel to the a axis.

Formula: C₁₆H₁₆O₄ and C₁₅H₁₃ClO₄

Online 22 December 2001


	Structure factor file (CIF format) (309.9 kbytes) Contains datablock 3a

	Structure factor file (CIF format) (150.0 kbytes) Contains datablock 3b

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