They are exemplified in a reaction that uses a strong Bronsted or Lewis acid to convert divinyl ketones to a form of pentenone.
They are exemplified in a reaction that uses a strong Bronsted or Lewis acid to convert divinyl ketones to a form of pentenone. Taking into account frontier orbitals, they classify certain systems as "symmetry allowed" and are supported by extended Huckel theory. They note that the reaction of compounds containing 4n+2 pi electrons will be a disrotatory process, while those containing 4n pi electrons will undergo a conrotatory process. This can be seen in the reaction of butadiene to cyclobutene, an electrocyclic process. For 10 points, identify this set of rules used for predicting the stereochemistry of pericyclic reactions.
They are exemplified in a reaction that uses a strong Bronsted or Lewis acid to convert divinyl ketones to a form of pentenone.
{Woodward-Hoffmann} rules