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Chapter 14d: Aromaticity \& NMR Name: 1. What type of spliting pattern would you observe for the aromatic protons on ortho-: meta-, and para-methylbenzaldehyde? 2. Shown below is a porphyrin ring system. The two NH protons in the center of the ring have a chemical shift of approximately 3ppm. Why? 3. How many carbon signals would be present in the following compounds? 4. In the presence of AgNO3&EtOH, the molecule on the left undergoes solvolysis very slowly however the molecule on the right undergoes solvolysis much faster. Explain. 5. An unknown compound has the molecular formula (CBH1O) and has the following 'H-NMR signals: 2.34 (singlet, 3H ), 3.83 (singlet, 3H ), 6.87 (doublet, 2H ) \& 7.12 (doublet, 2H ). What is the structure of the unknown compound