1. a. (1) Answer the below with reference to the structures shown in Figure 1. Predict the chemical shift position of H^ in the 'H NMR spectra of each of the structures (1) (2) and (3). With the use of appropriate resonance structures account for the trend you propose. 15 marks/ 14 marks] For structure (3) state the expected multiplicity of the H proton resonance. Draw, and label a splitting diagram and use it to account for the multiplicity you propose. Explain how the 'H NMR spectrum of compound (3) recorded in CDC13 plus a few drops of D.0 is expected to differ from the spectrum of the same compound recorded in CDC13. Include an equation in your answer. HN-CH3 NO2 (iii) 14 marks/ NO2 HA HA HA (1) ON (2) Figure 1 (3) )