Pyridine (C5H5N) and pyrazine (C4H4N2) have structures similar to benzene. Both compounds have structures with 6 atoms in a ring. Draw Lewis strcutures for pyridine and pyrazine showing the two most common resonance forms. The N atoms in pyrazine are directly opposite each other in the ring with 2 carbons between them in either direction. Indicate resonance with a double headed arrow between structures. Draw the Lewis structures with the formal charges minimized.