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Cycloaddition reactions

Ms. Savitha K.T.

A nodal plane is a plane of zero electron density.

The following reaction between two ethene molecules leading to cyclobutane, is a [2+2]- cycloaddition

The π-Molecular orbital picture of ethene is given below.


The FMO theory.

In the MO diagram the lobes on both sides are in phase, hence this process is photochemically feasible.
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Author Ms. Savitha.K.T.
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