Acta Crystallographica Section B

Structural Science

Volume 56, Part 6 (December 2000)

Acta Cryst. (2000). B56, 1046-1053 [doi:10.1107/S0108768100010946]

Comparison of the structural motifs of acetoacetanilides and related azo pigments

G. Chisholm, A. R. Kennedy, S. Wilson and S. J. Teat

Abstract: The structures of three methyl-substituted acetoacetanilides and of an azo pigment derived from one of them are presented and discussed together with a review of related known crystal structures. By considering the position of any aromatic substituents it is possible to predict whether the simple acetoacetanilides adopt planar structures with intramolecular hydrogen bonding or twisted structures featuring intermolecular hydrogen bonding. However, we find that the same crystal engineering rules cannot be applied to the related azo pigments: this is apparently due to the presence of an sp² atom which facilitates the adoption of planar conformations. The thermal properties of the acetoacetanilides were measured by DSC and are discussed with reference to their crystal structures.

Online 1 December 2000


	Structure factor file (CIF format) (120.2 kbytes) Contains datablock 9

	Structure factor file (CIF format) (63.2 kbytes) Contains datablock cib

	Structure factor file (CIF format) (116.2 kbytes) Contains datablock c3

	Structure factor file (CIF format) (96.0 kbytes) Contains datablock c2

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