Overlapping P-orbitals to Form Pi Bonds
h...@biorole.com
The Mesomeric effect is the effect of the overlap of a p-orbital with
the p-orbital on an adjacent atom in the chemical compound to form a
delocalised cloud of electrons over both the atoms called a p (pi)
bond. P-orbitals on many atoms may all overlap, to form an extensive p
bond but only as long as the number of electrons on each atom in the
conjugated system does not exceed the maximum allowed and the chain of
atoms is continuous. The effect is symbolized by M. The mesomeric
effect of delocalised electrons occurs in unsaturated organic
compounds, where the double bond is separated by a single bond.
Examples butadi-1,3-ene and aromatic compounds.
Read more about this http://mesomericeffect.blogspot.com/
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