Determining the crystal structure of twinned 2-methylpyrazine.
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.
Boese
R
R
Institut fur Anorganische Chemie, Universitaet-GH Essen, Universitaetstrasse 3-5, D-45117 Essen, Germany.
Gehrke
A
A
Kapon
M
M
Herbstein
F H
FH
D003460:Crystallization; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D011719:Pyrazines / Q000737:chemistry*; D013696:Temperature
D011719:Pyrazines