Organic Chemistry Question of the Day

The McLafferty rearrangement -- a pericyclic reaction that occurs because of hydrogen-bonding between a carbonyl oxygen and a hydrogen on a carbon three carbons away from the carbonyl.

The Cope elimination -- a pericyclic reaction that results in the elimination of a nitro-group (formed through oxidation of an amine via mCPBA) and the formation of an alkene.

The Diels-Alder reaction -- a percyclic reaction that results in the formation of a six-membered ring from a starting alkene and 1,2-conjugated diene.

A sigmatropic rearrangement resulting in a conjugated pi system.

The Hoffman rearrangement -- wherein a carbonyl group is converted into a primary amine.