A leaving group that does not carry away the bonding electron pair. For example, in the nitration of benzene by
NO2+,
H+
is the electrofuge. The adjective of electrofuge is electrofugal.
Transformed and rewritten from PDF version (entry
http://www.iupac.org/goldbook/E01965.pdf)
by: Miloslav Nic, Jiri Jirat, Bedrich Kosata, ICT Prague, Czech Republic