Electrophilicity

Electrophilicity:

 (1) The property of being electrophilic. (See ELECTROPHILE.)
(2) The relative reactivity of an electrophilic reagent. (It is also sometimes referred to as “electrophilic power.”) Qualitatively, the concept is related to LEWIS ACIDITY. However, whereas Lewis acidity is measured by relative equilibrium constants, ELECTROPHILICITY is measured by relative RATE CONSTANTs for reactions of different electrophilic reagents toward a common SUBSTRATE (usually involving attacking a
carbon atom).