Pyrazine (C4H4N2) and pyridine (C5H5N) have structures similar to benzene. Both compounds have structures with 6 atoms in a ring. Illustrate the Lewis structures for pyrazine and pyridine showing all 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. Illustrate the Lewis structures with the formal charges minimized.