Base of Lewis
Definition
A bases of Lewis or nucleophilic (name of the American chemist Gilbert Newton Lewis) is a chemical entity of which one of its components has a or not flexible doublet or more free electrons on its Couche of valence. They can form covalent bonds coordinates with a Acide of Lewis. Such a species is represented in representation of Lewis by a feature on the atom concerned.
Examples
Ion hydroxide:
Ion éthanoate:
Ammonia:
Ion fluoride:
Reactivity
The reaction between a base and an acid of Lewis forms a adduit of Lewis. The nonflexible doublets of the base of Lewis come to fill the gaps of the layers of valence of the acids of Lewis.
Example: Formation of a indduit of Lewis enters the éthoxyéthane and a mixed Organomagnésien.
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Alkalinity within the meaning of Brönsted
A base according to the Swedish chemist Johannes Nicolaus Brönsted is a chemical species likely to collect a H+ proton. It is about a particular case of the theory of Lewis where, in aqueous solution, the proton + plays the part of acid of Lewis.
See too
- Acid of acido-basic Lewis
- Reaction