Depto. Química Orgánica

ALKENES

Image Link UAM Excelencia UAM Facultad Ciencias UAM
15/07/2017
web counter
web counter
Structural Features
Preparation
Reactivity
A C=C double bond bears a "pi" electron cloud from which electrons can be ceded to an electrophilic opponent.

Hence, the most important reaction of alkenes is electrophilic addition.

Addition to alkenes is thus the opposite reaction to elimination leading to alkenes. 
Image
Image
Addition reactions are generally exothermic and therefore thermodynamically favorable. However, they don't usually proceed spontaneously.

If a plausible reaction path exists, i.e. with transition states reasonably high in energy, addition reactions proceed with energy release. 
Addition Reactions
Other Reactions