Allyl And Vinyl Carbocation. Atoms or groups attached to an allylic carbon are termed allylic substituents. The lightest allylic carbocation 1 is called the allyl carbocation. The allylic carbon and the nearby double bond.
Allyl group holds three carbon atoms and five hydrogen atoms on the other hand vinyl group has two carbon atoms and three hydrogen atoms. A vinyl cation prefers to be linear but due to geometrical constraints imposed by the aromatic ring the aryl cation must be bent and the empty orbital is forced to be ce sp 2 rather than ce p.
An allylic carbon is an sp3 carbon that is adjacent to a vinylic carbon.
An allylic carbon is one that is directly attached to a pi bond. An allylic carbocation in which an allylic carbon bears the positive charge. These three factors combine to make the aryl carbocation even higher in energy than the vinyl cation. Allyl group holds three carbon atoms and five hydrogen atoms on the other hand vinyl group has two carbon atoms and three hydrogen atoms.
