D. Carter, F. P. Boer
Apr 1, 1972
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Journal
Journal of Heterocyclic Chemistry
Abstract
A three-dimensional X-ray structure determination of 2,5-dichloro-3-methoxypyrazine has been completed with diffractometer data. The crystals are monoclinic, space group P21/c, with lattice constants a = 4.059, b = 15.773, c = 11.123A and β = 90.96° (Z = 4). The structure was solved by Sayre's equation and all hydrogen atoms were located by difference synthesis. Full-matrix least-squares refinement of all position parameters, hydrogen isotropic temperature factors, and anisotropic temperature factors for all other atoms converged at R = 5.7% for the 1397 reflections above background. Bond distances and angles are consistent with literature values.