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 ?
Nitro group attached to a benzene ring acts as a very strong lewis base due to high electron density on oxygen and t e electron withdrawing inductive and resonance effect of nitro group [24].
Often, alkali metal alkoxides are also used in conjunction with Lewis base modifiers to achieve even higher vinyl contents (ref.
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.
The technique uses the Lewis acid tris(pentafluorophenyl) borane and the Lewis base tetramethylpiperidine that have been modified to be too large to get close enough to form an adduct (Lewis bases, which carry a lone pair of electrons, can bond with Lewis acids to form molecules called adducts).
Treatment of 5 with a variety of Lewis bases such as P[Me.
The nitrogen analog of this heterocycle (bipytidine) is a commonly employed chelating Lewis base, which reacts with Lewis acidic metals and other species.
9 Hence, in addition to forming isolable 1:1 adducts with small Lewis bases (eg.

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