239 Nucleic Acids

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4 Terms

1
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Benzene with EDG

substituent adds to C4

  • EDG stabilizes carbocation intermediates by donating electrons into the ring

2
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Benzene with EWG

substituent adds to C3

  • EWG creates partial positive on carbon outside of benzene, and this does not want to be near the carbocation

3
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pyridine

substituent adds to C3

  • additional resonance structure that is stable

4
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any 5 membered ring (pyrrole, furan, thiophene)

substituent adds to C2

  • additional resonance structure that stabilizes it