Acta Cryst. (2001). E57, o1116-o1117  [ doi:10.1107/S1600536801017846 ]

2,6-Dimethylpyrazine at 5 K: a neutron-diffraction study

E. Kaiser-Morris, B. Nicolaï, A. Cousson, W. Paulus and F. Fillaux

Abstract: Single-crystal neutron-diffraction techniques are used to determine the crystal structure of 2,6-dimethylpyrazine (DMP), C₆H₈N₂, at 5 K. The space group is P2₁/a with Z = 4, as at room temperature. The methyl groups are ordered. There are two crystallographically inequivalent methyl groups in the unit cell. Different rotational dynamics may account for the two rotational tunnelling transitions observed with inelastic neutron-scattering techniques.

Online 27 October 2001

Copyright © International Union of Crystallography
IUCr Webmaster