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Based on Your Knowledge of Electrophilic Aromatic Substitution,and Assuming the Thiophene

Question 156

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Based on your knowledge of electrophilic aromatic substitution,and assuming the thiophene ring of benzo[b]thiophene (shown)is activated toward electrophilic aromatic substituted more so than the benzenoid ring,predict the preferential position of attack of an electrophile,i.e.,does the electrophile E+ attack carbon 2,or 3? Explain your answer. Based on your knowledge of electrophilic aromatic substitution,and assuming the thiophene ring of benzo[b]thiophene (shown)is activated toward electrophilic aromatic substituted more so than the benzenoid ring,predict the preferential position of attack of an electrophile,i.e.,does the electrophile E<sup>+</sup> attack carbon 2,or 3? Explain your answer. Which substitution product forms preferentially and why? Which substitution product forms preferentially and why?

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3-substitution is preferred,since this l...

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