1,4-Bis(3-chloro­pyrazin-2-yl­oxy)benzene

In the title compound, C₁₄H₈Cl₂N₄O₂, the pyrazine rings are orthogonal to the benzene ring, making dihedral angles of 88.42 (8) and 89.22 (8)°. The Cl atoms attached to the pyrazine rings deviate by −0.0597 (5) and 0.0009 (5) Å from the ring plane. The crystal structure features C—H...N hydrogen bonds.

N-tert-Butyl-2-[4-(dimethyl­amino)­phen­yl]imidazo[1,2-a]pyrazin-3-amine

In the title compound, C₁₈H₂₃N₅, the imidazole ring makes a dihedral angles of 3.96 (8) and 19.02 (8)°, respectively, with the pyrazine and benzene rings while the dihedral angle between the pyrazine and benzene rings is 16.96 (7)°. In the crystal, mol­ecules are linked via N—H...N hydrogen bonds, forming chains along [010]. These chains are linked by C—H...N hydrogen bonds, forming two-dimensional networks lying parallel to (001).