Acta Cryst. (2006). E62, o4979-o4980  [ doi:10.1107/S1600536806041213 ]

2,3,7,8-Tetra-2-pyridylpyrazino[2,3-g]quinoxaline dihydrate

A. Neels and H. Stoeckli-Evans

Abstract: The title compound, C₃₀H₁₈N₈·2H₂O, is a solvate of 2,3,7,8-tetra(pyridin-2-yl)pyrazino[2,3-g]quinoxaline and, like the latter, is crystallographically centrosymmetric. The pyrazine ring makes dihedral angles of 54.95 (6) and 28.09 (6)° with the two independent pyridine rings. The two pyridine rings are inclined to one another by 56.77 (7)°, with their N atoms facing each other. In the crystal structure, adjacent molecules are linked by O-HN hydrogen bonds, forming a wide ribbon-like structure extending in the ac plane.

Online 13 October 2006

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