Suggested solution the numbers show how many electrons

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Unformatted text preview: ions for Chapter 7 – Delocalization and Conjugation PROBLEM 4 Which (parts) of these compounds are aromatic? Justify your answer with some electron counting. You may treat rings separately or together as you wish. You may notice that two of them are compounds we met in problem 2 of this chapter. N O O CO2Me OH MeO H NHAc MeO MeO OH O OH OH O aklavinone: a antibiotic O OMe colchicine: a compound from the Autumn crocus used to treat gout Purpose of the problem A simple exploration of the idea of aromaticity: can you count up to six? Remember: count only those π electrons in the ring and on no account put one...
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