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- 16. Draw significant resonance structures for the following compound. Which of this is/are most significant resonance structure(s)? Explain why. (a) مهم (b) the H H- (c)#10 Nomenclature of Aromatic Compounds Name the following aromatic compounds following IUPAC system of nomenclature. Br NH, OH HO O NO,Draw the resonance structures for the following compound and circle the one that contributes most to the resonance hybrid. Why? OH
- How come the structure labeled as 1 has 8 pi electrons? If the double bond has 2 pi electrons, and you count the lone pairs, wouldn't it have 6 pi electrons? Why does the structure labeled as 2 has aromaticity? If the pi bond has 2 pi electrons and then you coun the lone pairs, wouldn't it only have 5 pi electrons?Identify the aromatic compounds. I II III IV I and II III and IV All of the answers are correct. O I, II, and IVDraw resonance structures for each of the molecules shown below. НО а) d) NH2 b) c) N- NH2
- What is the IUPAC name of compound B? ОН NO, Br Br Br СО Н A B.Classify each of the following reactions as a substitution, elimination or addition reaction: Br Нeat (a) Br2 + HBr Br CN (b) + CN + Br Br (c) + Br2 Br8. Assign each of the following aromatic substituents as electron-donating or electron- withdrawing groups. Electron-donating (EDG) or electron-withdrawing (EWG)? H CH3 NH2 O=S=O N OCH3 ||| CH3 CF3 5 8 6 8 8 8 8 8 8

