STRUCTURE OF 2,3-DI(2-PYRIDYL)-6,7-DIMETHYLQUINOXALINE

C20H16N4, M(r) = 312.37, monoclinic, C2/c, a = 16.474 (1), b = 13.132 (1), c = 7.638 (1) angstrom, beta = 99.24 (1)-degrees, V = 1630.9 (3) angstrom 3, Z = 4, D(x) = 1.272 g cm-3, lambda(Cu K-alpha) = 1.54178 angstrom, mu = 5.78 cm-1, F(000) = 656, T = 291 K, R = 0.0450 for 1021 unique reflections. The structure consists of molecules oriented about the twofold axes. The angle between the least-squares planes for the quinoxaline part of the molecule and the pyridyl fragment is 39.65 (5)-degrees.