A nucleofuge (derived from nucleo, nucleus, the positive part in an atom and fuge, fugetive, to run away, to escape) is a leaving group which retains the lone pair from its previous bond with another species. For example, in the SN2 mechanism a nucleophile attacks an organic compound containing the nucleofuge (the bromo group) which simultaneously...
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http://en.wikipedia.org/wiki/Nucleofuge
A leaving group that carries away the bonding electron pair. For example, in the hydrolysis of an alkyl chloride, Cl
- is the nucleofuge. The tendency of atoms or groups to depart with the bonding electron pair is called nucleofugality. The adjective is nucleofugal. See also electrofuge, nucleophile.
Found on
http://www.chem.qmul.ac.uk/iupac/gtpoc/NO.html
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