PERICYCLIC REACTIONS

Pericyclic reactions are the concerted reactions involving reorganization of electrons which occur by the way of a single cyclic transition state.

Characteristics of Pericyclic reactions:

* The pericyclic reactions occur in single step and hence there is no intermediate formed during the reaction.

* The breaking and making of bonds (both σ & π) occur simultaneously in a cyclic transition state.

* The configuration of the product depends on

1) the configuration of reactants

2) the number of electron pairs undergoing reorganization and

3) the reaction conditions (like thermal or photochemical).

READ MORE AT
http://www.adichemistry.com/organic/pericyclics/introduction/pericyclic-reactions.html

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