electrofuge

https://doi.org/10.1351/goldbook.E01965
A @L03493@ 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.
See also:
electrophile
,
nucleofuge
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1109 [Terms] [Paper]