Lewis base


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Lewis base


[After Gilbert Lewis.]

Lewis base

n
(Elements & Compounds) a substance capable of donating a pair of electrons to an acid to form a covalent bond. Compare Lewis acid
[C20: named after G. N. Lewis (1875–1946), US chemist]
Translations
base de Lewis
References in periodicals archive ?
In addition, the active carbocation is stabilized through interactions with the counter anion and/or interactions with Lewis base additives present in the polymerization system.
Generally halogen bonding is of two types, (i) halogen halogen interaction X X which is due to anisotropic distribution of electron density among halogen atoms, (ii) halogen lewis base interaction X AX.
5 or less is obtained by carrying out a polymerization reaction in conjugated diene compounds using a catalyst composition containing a rare earth element-containing compound or a reaction product of the rare earth element-containing compound with a Lewis base, an aluminoxane and/or organoaluminum compound, and an iodine-containing compound.
The dissociation of calcium carbonate in water is well known -- exhibiting associated Lewis base sites with various dissociation complexes including significant ionic species that are formed in situ ([H.
Their frustrated pair comprised of the Lewis base tetramethylpiperidine or TMP and the Lewis acid tris(pentafluorophenyl)borane.
Tomoaki Iishiba, 34, who served as an intelligence liaison officer at the Army's Fort Lewis base in Washington state, allegedly conspired with a partner from around 2006 through February 2008 to purchase night-vision sights and gun parts from a company in Illinois and export them to Japan without obtaining U.
Supporters of the Quiggins store yesterday staged a protest outside the John Lewis base on Church Street and collected 5,000 signatures from the public.
Tertiary amines also use a Lewis base mechanism which increases the nucleophilic properties of the alcohol compound.
So did Lewis base camel-faced Sebulba on any of the people he impersonates?
Initially, in order to determine optimal polymerization reaction conditions, the influences of catalyst quantity, Lewis base quantity, and monomer concentration on the inherent viscosity of the polymer were examined by the Friedel-Crafts acylation of IPC with a mixture of 70 mol% BPOBBP and 30 mol% DPODPS in DCE using anhydrous aluminum chloride as a catalyst and NMP as a Lewis base and the results are listed in Table 1.
Aromatic rings are Lewis base sites and their presence in porous solids improves the gas storage capacity through either acid-base interactions (the case of CO2-acidic molecule) or induced dipole (the case of H2).

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