Alpha Effect
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The alpha effect refers to the increased nucleophilicity of a molecule due to the presence of an adjacent (alpha) atom with non-bonding electrons. These non-bonding electrons donate into the adjacent atom to form a resonance structure with a Pi bond and increased electron availability for the nucleophile.
The molecule does not necessarily exhibit increased basicity compared with a similar molecule without the adjacent, electron donating atom.
[edit] References
"Chemical Reactivity ." 14 July 2006. Michigan State University. 27 Jul 2006 <http://www.cem.msu.edu/~reusch/VirtTxtJml/react3.htm>.
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