CHEM266 Chapter Notes - Chapter 9: Regioselectivity, Elimination Reaction, Alkene

• School: University of Waterloo
• Department: Chemistry
• Course: CHEM266
• Professor: Steve Forsey

Document Summary

Chapter 9 notes e1 reactions to form alkenes. Carbons bonded adjacent to a specific functional group are labeled outward using greek letters (this can also apply to the hydrogens bonded to labeled carbons) Elimination reaction: removal or elimination of substituents of the molecule to form an alkene in one- or two-step (cid:373)e(cid:272)ha(cid:374)is(cid:373), ofte(cid:374) (cid:272)alled -eli(cid:373)i(cid:374)atio(cid:374) (cid:271)e(cid:272)ause o(cid:272)(cid:272)urs (cid:271)et(cid:449)ee(cid:374) the a(cid:374)d (cid:272)ar(cid:271)o(cid:374)s. Leaving group (lg): must be able to leave as a relatively stable, weakly basic molecule or ion. Unimolecular (e1): rate of reaction is only dependent on [substrate], reaction rate is first-order. Bimolecular (e2): rate of reaction is dependent on [base] and [substrate], reaction rate is second-order. Stereoselective reaction: a single reactant can produce two or more stereoisomeric products and one of these products is preferred over the other. Stereospecific reaction: single reactant can produce two or more stereoisomeric products and one of these products is exclusively formed over the other(s)