title: Determining the crystal structure of twinned 2-methylpyrazine.
abstract: Although systematic absences and symmetry relations among reflections pointed to space group I4(1)22 (one molecule in the asymmetric unit), a direct methods solution could only be obtained in I(-)4 (two molecules in the asymmetric unit). Refinement in I(-)4 was unsatisfactory until merohedral twinning was taken into account. The resulting molecular dimensions are in excellent agreement with analogous values in the literature. The molecular arrangement is described.
authors.affiliation: Institut fur Anorganische Chemie, Universitaet-GH Essen, Universitaetstrasse 3-5, D-45117 Essen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Boese
authors.forename: A
authors.initials: A
authors.lastname: Gehrke
authors.forename: M
authors.initials: M
authors.lastname: Kapon
authors.forename: F H
authors.initials: FH
authors.lastname: Herbstein
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D011719:Pyrazines / Q000737:chemistry*; D013696:Temperature
chemical_list: D011719:Pyrazines