title: Structure determination of three polymorphs of xylazine from laboratory powder diffraction data.
abstract: The crystal structures of three xylazine hydrochloride [N-(2,6-dimethylphenyl)-5,6-dihydro-4H-1,3-thiaz-2-amine hydrochloride] polymorphs A, Z and X have been solved from powder diffraction data and refined using Rietveld refinement. Data were obtained with Cu Kα radiation. All polymorphs were found to have structures with Z' = 1 and Z = 4. All the structures determined contained strong hydrogen bonds between the amino groups and chloride anions. The crystal structures of forms A and X featured π-π stacking interactions.
authors.affiliation: Department of Chemistry, University of Latvia, Kr. Valdemāra 48, Rīga LV 1013, Latvia.
authors.forename: Alvis
authors.initials: A
authors.lastname: Zvirgzdins
authors.affiliation: Latvian Institute of Organic Syntheses, Physical Organic Chemistry Laboratory, Aizkraukles 21, RigaLV 1006, Latvia.
authors.forename: Anatolijs
authors.initials: A
authors.lastname: Mishnev
authors.affiliation: Department of Chemistry, University of Latvia, Kr. Valdemāra 48, Rīga LV 1013, Latvia.
authors.forename: Andris
authors.initials: A
authors.lastname: Actins
keywords: polymorphism; powder diffraction; xylazine hydrochloride