Rules For Writing Resonating Structures

Chemical Bonding of Class 11

RULES FOR WRITING RESONATING STRUCTURES

  • Only electrons (not atoms) may be shifted and they may be shifted only to adjacent atoms or bond positions.
  • The number of unpaired electrons should be the same in all the canonical forms.
  • The positive charge should reside as far as possible on less electronegative atoms and the positive charge on the more electronegative atoms.
  • Like charge should not reside on adjacent atom
  • The larger the number of resonating structures greater the stability of the species.
  • A greater number of covalent adds to the stability of the molecule.
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