Lewis acid


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Related to Lewis acid: Bronsted acid

Lewis acid


[After Gilbert Lewis.]

Lewis acid

n
(Elements & Compounds) a substance capable of accepting a pair of electrons from a base to form a covalent bond. Compare Lewis base
[C20: named after G. N. Lewis (1875–1946), US chemist]
Translations
acide de Lewis
References in periodicals archive ?
Once it was disclosed that the C-F bond of glycosyl fluorides could be activated by a weak Lewis acid, stannous chloride (A = Sn[Cl.
Then, optionally, a second activator component and/or Lewis acid and subsequently the metal complex were added, and the resulting mixture was allowed to stir for an additional 30 minutes.
A number of polymerization variables can be used to tailor the nature of a carbocationic polymerization including temperature, initiator composition, Lewis acid coinitiator composition and concentration, addition of a Lewis base, Lewis base composition and concentration, and solvent composition.
The most common methods for polyesterification use strong Bronsted or Lewis acid catalysts, usually using large excess of either carboxylic acid or alcohol monomer in order to achieve high reaction yields (OLAH et al.
Finally applications of iron-containing complexes to specific chemical transformations are discussed, including reductions, asymmetric synthesis, Lewis acid catalysis, C-C bond formation with C-H bond activation, and cross-coupling.
borane high reaction temperature [9], addition of acetic acid [10], mineral acid [11] and lewis acid [12] are required.
3]/bentonite nanocomposite and Na-bentonite in each sample weight (mmol/g) both Bronsted acid sites and Lewis acid sites without seeing how strong acidic sites.
Silica can potentially create Lewis acid sites and the mixed silica alumina coating can possess both acid and basic sites.
Carbon dioxide also has several other favorable advantages including: being a quadrupolar solvent; having the potential to act as both a weak Lewis acid and Lewis base; being able to be easily removed, enabling rapid recovery of isolated compounds; and, when used for SFC, it can be recovered from the atmosphere, making it a "green" solvent.
Mori et al developed a fast-curing adhesive using silyl groups and a Lewis acid such as metal halides or boron halides as curing catalysts.
Their frustrated pair comprised of the Lewis base tetramethylpiperidine or TMP and the Lewis acid tris(pentafluorophenyl)borane.
The 3-APB Lewis acid receptor endows the hydrogel with saccharide responsivity, and ATMA is included at the specified concentration because of its ability to modify the sugar response of the sensor and increase its selectivity for glucose over other saccharides possessing cis-1,2- or -1,3-diols, including the main potential interferent for phenylboronic acids, fructose.

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