Chemistry 610, Organic Reactions I. Aliphatic Nucleophilic Substitution Reactions A. Overview 1. With more complicated structures you have to look at the whole molecules stereochemistry.
Real life is complicated.
We want to concentrate on the working reactions. Almost Entirely SN2 reactions - 1deg. Most of these aren't synthetically useful, since forms C-O bond that you likely started with somewhere. Our starting functionality will usually be an alcohol. OH is not a usable leaving group 2.