Key Concepts—Alkyl Halides and Elimination Reactions

Nucleophilic substitution—A nucleophile attacks a carbon atom (7.6). 

In both reactions RX acts as an electrophile, reacting with an electron-rich reagent. 

Both reactions require a good leaving group Xr that can accept the electron density in the C X bond. 

In elimination, a Bronsted-Lowry base removes a proton to form a n bond, and two carbons are involved in the reaction. 

Alkyl halide Rate R3CX RpCHX RCHpX (8.4C) 

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