a molecule that has electrons that they can share making it possible to bond with alkylating agents
an ion or molecule that can donate electrons
an the electron rich species that will react with an electron poor species A substitution implies that
a "nucleus lover," or a chemical species that donates electrons
a species (an ion or a molecule) which is strongly attracted to a region of positive charge in something else
a species (either a negatively charged ion or a negative region in a polar molecule) which is attracted to a positive site in another substance
a species that attacks positive (or slightly positive) centres in other molecules or ions
A species (compound or ion) that has a free valence shell electron pair, which may bond to an electrophile (or Lewis acid).
a substance which donates a pair of electrons in the reaction considered.
In chemistry, a nucleophile (literally nucleus lover as in nucleus and phile) is a reagent that forms a chemical bond to its reaction partner (the electrophile) by donating both bonding electrons.Gold Book definition http://www.iupac.org/goldbook/N04249.pdf Link Because nucleophiles donate electrons, they are by definition Lewis bases (see acid-base reaction theories). All molecules or ions with a free pair of electrons can act as nucleophiles, although negative ions (anions) are more potent than neutral reagents. Neutral nucleophilic reactions with solvents such as alcohols and water are named solvolysis.