PPT Slide

• The bond order in O 3 is 3 electron pairs /2  atom-to-atom linkages, or 1 1/2.

• Each bond consists of a single bond (localized electron pair) and   a partial bond (contribution from delocalized electron pair).

• Electron delocalization stabilizes the molecule by spreading out   the electron density and reducing electron - electron repulsions.

• Benzene (C 6H 6 ), has two important resonance forms in which alternating single and double bonds have different positions.

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• Delocalization gives two identical bonds.

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