Resonance Double bond to this oxygen? H :0: Nitromethane Or to this oxygen? Thomson-Brooks Cole N-O=130pm N=0=116pm Nitrogen-oxygen bond in nitro-methane 122pm Neither of the two Lewis structures is correct by itself. True structure is intermediate between the two The two individual Lewis structures are called resonance forms Resonance „ Neither of the two Lewis structures is correct by itself. „ True structure is intermediate between the two „ The two individual Lewis structures are called resonance forms N-O = 130pm N=O = 116pm Nitrogen-oxygen bond in nitro-methane = 122pm