CHM136H1 Lecture Notes - Lecture 15: Prochirality, Organic Reactions, Electron Pair

• School: UTSG
• Department: Chemistry
• Course: CHM136H1

Document Summary

Bring questions on wednesday: prof will go over any question. Place of reaction affects the molecule, creates enantiomers. Product is chiral even though reactants are achiral. Note that re and si refer to the reactant only. Raise priority of interest atom over other identical atom, leave other priorities. Addition: the number of atoms attached to carbon increases. Elimination: number of atoms attached to carbon decreases. Below: uses a base to remove the bromine atom. Substitution: number of atoms attached to carbon stays the same. Rearrangement: bonds and atoms are reorganized within the molecule. Fishhook arrow shows movement of a single electron. Full headed arrow shows movement of a pair of electrons. Below: homolytic reaction, fishhook arrows show movement of indiv electrons. Below: heterolytic reaction, full arrow showing movement of a pair of electrons. One full arrow = 2 electrons = 2 fishhook arrows. Lewis acids and bases revisited - example below. Ho- (lewis base) + bf3 (lewis acid) --> ho-bf3.