- Negatively charged or electron-rich or nucleus attracting species are called as nuclephile.
It is classified into 3 categories:
a. Charged nucleophiles: Negatively charged species are called nucleophiles. (e.g, H–, OH–, RO–, CH3–, X–, SH– )
b. Lone pair containing neutral nucleophiles: Neutral covalent compound, in which central metal atom has a complete octet, has at least one lone pair of electrons and all atoms present on the central atom should not be electronegative. (e.g, NH3, NH2-NH2, R3N).
c. Ambident Nucleophiles: Species have two nucleophilic centers, one is neutral and the other is charged.(CN, NO2)