CHM136H1 Lecture Notes - Lecture 18: Pi Bond, Reaction Intermediate, Reaction Mechanism

• School: UTSG
• Department: Chemistry
• Course: CHM136H1
• Professor: Clive Scott Browning, Ronald Kluger

Document Summary

O is more electronegative than n, so it handles its lone pair, and the negative charge it gains after reacting, better than n. Br is a highly electronegative atom, so it is stable with the negative charge. Whether or not this reverse reaction occurs depends on how well the reactants and products can "handle" its lone pairs / negative charge (see above) H cannot bond like this, so it has to relinquish its electrons to br the ketone is acting as the lewis base / nucleophile. O is delta negative, with two lone pairs. N is nucleophilic, donates electron pair to c. H is delta poisitve, susceptible to attack from ketone. Another polar reaction in detail: a typical alkene reaction ethene + hbr -> bromoethane dissolved in diethyl ether (reaction medium) Electrophilic addition of hx to an alkene to form a haloalkane.