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CBSE Class 12-science Answered

resonance
Asked by khem singh | 31 Jan, 2012, 10:46: AM
Expert Answer
Rules for drawing reasonable resonance structures for a given molecule
  •  All resonance structures must be valid Lewis structures.
  •  In all possible resonance structures the atomic nuclei must not change their positions.
  •  All atoms must not change their hybridization.
  • Only electron distribution may be changed.
  •  All resonance structures must have the same number of unpaired electrons.
  • All atoms involved in the resonance (electron sharing) and the atoms directly bonded to them
must lie in (or nearly in) the same plane.
for example:
  • If the structures differ in the position of atoms, they are isomers, not resonance structures

 

Answered by | 31 Jan, 2012, 12:37: PM
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