This organic chemistry video tutorial explains how nucleophilic substitution reactions work. It focuses on the SN1 and Sn2 reaction mechanism and it provides plenty of examples and practice problems. The Sn2 reaction is a second order nucleophilic substitution reaction where the rate is dependent on the concentration of the substrate / alkyl halide and the nucleophile. SN2 reactions occur with inversion of configuration and work well with methyl and primary substrates. It's a concerted reaction mec
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