Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 12 (December 2008)

organic compounds

 

Two polymorphs of chlorpropamide: the -form and the high-temperature -form

T. N. Drebushchak, N. V. Chukanov and E. V. Boldyreva

Abstract: The -form of chlorpropamide [systematic name: 4-chloro-N-(propylaminocarbonyl)benzenesulfonamide], C₁₀H₁₃ClN₂O₃S, has been obtained as single crystals from solution (and not as a polycrystalline sample by heating the -, - or -forms). The results of anisotropic structure refinements for the - and -forms are reported. The density of the -polymorph is the highest, and that of the -polymorph the lowest, among the five known chlorpropamide polymorphs. The main intermolecular hydrogen-bonding pattern in polymorphs and is the same as in polymorphs , and , but the conformations differ. The densities of the polymorphs were found to depend on the molecular conformations.

Formula: Two polymorphs of C₁₀H₁₃ClN₂O₃S

	Structure factor file (CIF format) (104.1 kbytes) [ doi:10.1107/S0108270108034550/tr3050d-formsup2.hkl ] Contains datablock d-form
	Structure factor file (CIF format) (117.8 kbytes) [ doi:10.1107/S0108270108034550/tr3050e-formsup3.hkl ] Contains datablock e-form

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