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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.

MOethene

The FMO theory.

fmotheory4n2
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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