Why are positively charged ions electrophiles ? Watch

lewis.h
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Positively charged ions have lost an electron, effectively to gain a full outer shell, which makes them stable, right ?

So why would they accept electron pairs, making them electrophiles? Surely this would be pointless, as the electrophile having accepted the electron pair would be back to square one ?
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Eubacteria
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Well electrophiles are also known as lone pair acceptors - the lone pairs are found on atoms on molecules and electrophiles use these lone pairs to form a covalent bond to the molecule. Electrophiles can be cations or they can just be positive dipoles e.g. a Br+ ion could be called an electrophile.

Electrophiles are pretty much just more reactive forms of the atoms and they are generally needed in order to cause a chemical reaction that is due to high electron density of a molecule.

We only really see them in electrophilic addition -- the electrophiles accept an electron pair from the alkene's pi bond (double bond) to become covalently bonded to the molecule and form a saturated compound and in electrophilic substitution where the electrophile accepts a pair of electrons from the benzene ring's delocalised pi ring system to form a covalent bond to the benzene ring.
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