Electrophiles : Electron deficient species or electron acceptor is an electrophile.
It can be divided into two types :
(i) Charged electrophiles : Positively charged species in which central atom has incomplete octet is called charged electrophile.
All cations are charged electrophiles except cations of IA, IIA group elements, Al+++ and
(ii) Neutral electrophiles : It can be classified into three categories,
(a) Neutral covalent substance in which central molecule has incomplete octet is neutral electrophile,
(b) Neutral covalent substance in which central molecule has complete or expended octet and central atom has unfilled -d-sub-shell is neutral electrophile,
SnCl4, SiCl4, PCl5, SF6, IF7
(c) Neutral covalent element in which central molecule is bonded only with two or more than two electronegative atoms is called neutral electrophile.
BeCl2, BX3, AlX3, FeX3, SnCl4, PCl3;
Cl2, Br2 and I2 also acts as neutral electrophiles.
Electrophiles are Lewis acids.
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