An example of the <a href="https://en.wikipedia.org/wiki/SN2_reaction" class="extiw" title="w:SN2 reaction">SN2 reaction</a> in organic chemistry.  Drawn in ChemDraw by <a href="//commons.wikimedia.org/wiki/User:Walkerma" title="User:Walkerma">User:Walkerma</a>, September 2005.
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24 September 2005 (original upload date)
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