Lewis acid
Noun
Meaning
Lewis acid (plural Lewis acids)
(chemistry) Any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond.
Antonyms
Examples
18 possible), we can anticipate that TiCl 4 will be a good Lewis acid.
A Lewis acid is a species that accepts a pair of electrons from another species; in other words, it is an electron pair acceptor.
BF 3 is a Lewis acid because it accepts the electron pair from fluoride.
The sulfur acts as soft Lewis acid (i.e. donor/electrophile) allows the S-methyl group to be transferred to an oxygen, nitrogen or aromatic system, often with the aid of other cofactors such as cobalamin (vitamin B12 in humans).
Carboxylic acids can be seen as reduced or alkylated forms of the Lewis acid carbon dioxide ; under some circumstances they can be decarboxylated to yield carbon dioxide.
In modern terminology, an acid is implicitly a Brønsted acid and not a Lewis acid, since chemists almost always refer to a Lewis acid explicitly as a Lewis acid.