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38 CHAPTER 2 the original carbon-nitrogen bond can become a lone pair on a different carbon atom. (b) Two curved arrows are required to convert resonance structure 2a to resonance structure 2c. One arrow shows that the lone pair on carbon can become a carbon-carbon bond while the other arrow shows that the electrons in the carbon-oxygen bond can become a third lone pair on oxygen. 2.18. (a) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: O O O O (b) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (c) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (d) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (e) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (f) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (g) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: (h) This pattern (lone pair next to a bond) has two curved arrows. The first curved arrow is drawn showing a lone pair becoming a bond, while the second curved arrow shows a bond becoming a lone pair: www.MyEbookNiche.eCrater.com