Lewis base


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Le·wis base

(lū'wis),
a base that is an electron-pair donor.

Le·wis base

(lū'is bās)
A base that is an electron-pair donor.

Lewis base

A substance that donates an electron pair to an acid, forming a covalent bond with the acid.
References in periodicals archive ?
Halogen bonding is directly related to electron donation of lewis bases to halogen atoms and can be defined as the non- covalent interaction of halogens with halogens or lewis bases [14-16].
This is because that MAAM, a Lewis base unit, could form hydrogen bond with Lewis acid of MAA unit and the formed hydrogen bond has much higher bond energy than that formed between MAAM and MMA or MAA and MMA.
Polar modifiers comprised of Lewis bases are most often employed to control the level of vinyl structures formed during lithium-based anionic polymerization in non-polar solvents.
Treatment of 5 with a variety of Lewis bases such as P[Me.
3)2] in the presence of a Lewis base, L, affords trans-Cp*W(NO)(H)[(CH.
In the first phase of this aim, we will synthesize neutral and cationic, mono- and bidentate candidate compounds and determine their association constants with a variety of Lewis bases.
2] molecule can be bent and activated by molecules with Lewis acids at one end and Lewis bases at the other.
Indeed, Figure 4 shows nicely that furan leads always to the more stable complex among the Lewis bases.
Among their topics are recyclable organocatalysts in asymmetric reactions, the synthesis of chiral catalysts supported on organic polymers, asymmetric catalytic synthesis in supercritical fluids, microwave-assisted transition metal-catalyzed asymmetric synthesis, silicate-mediated stereoselective reactions catalyzed by chiral Lewis bases, and stereoselective nitrogen heterocycle synthesis mediated by chiral metal catalysts.
However, concerning bases, a limited number of factors influence the strength of Lewis bases, which according to Laurence (chemistry, U.
We have compared the ability of the HF, B3LYP, MP2, G2(MP2), and CBS-QB3 methods to predict the gas-phase complexation enthalpies of eight Lewis bases with borontrifluoride.
Lewis bases the asymmetry of causation on counterfactual irreversibility, which fails, (11) in his view, only in those special situations in which causation asymmetry also fails, very far from our case.

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