Crystal and molecular structure of 2,3-dichloro-5-ethylamino-6-methoxypyrazine

Abstract

The crystal structure of the title compound has been determined from three-dimensional diffractometer data. Crystals are monoclinic, space group P2₁/c, with unit cell parameters a= 9·167 ± 0·003, b= 12·558 ± 0·005, c= 8·602 ± 0·003 Å, β= 99·46 ± 0·02°, Z= 4. The structure was solved by Patterson and Fourier methods and refined by full-matrix least-squares to R 4·3% for 1885 observed reflections. Bond angles and distances indicate a preferred resonance structure.