catalysts - Lewis acids

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• Chiral Lewis acid — Chiral Lewis acids (CLAs) are a novel class of Lewis acid catalyst used in enantioselective asymmetric synthesis reactions which produce optically active products from optically inactive or impure starting materials. This type of preferential… …   Wikipedia

• acid–base reaction — ▪ chemistry Introduction       a type of chemical process typified by the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O; or acetic acid, CH3CO2H) or electrically charged (ions, such… …   Universalium

• Коптюг — Коптюг, Валентин Афанасьевич Валентин Афанасьевич Коптюг Дата рождения: 9 июня 1931(1931 06 09) Место рождения: Юхнов, Западная область, СССР Дата смерти: 10 января 1997 …   Википедия

• Lanthanide triflates — are triflate salts of the lanthanide family with many uses in organic chemistry as Lewis acid catalysts. The catalysts act similar to aluminium chloride or ferric chloride, but are stable in water, which makes it possible to use water as solvent… …   Wikipedia

• Base (chemistry) — For the term in genetics, see base (genetics) Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration …   Wikipedia

• Ethylene oxide — Oxirane redirects here. For oxiranes as a class of molecules, see epoxide. Ethylene oxide …   Wikipedia

• Acid — This article is about acids in chemistry. For the drug, see Lysergic acid diethylamide. For other uses, see Acid (disambiguation). Acidity redirects here. For the novelette, see Acidity (Novelette). Acids and Bases …   Wikipedia

• Bifunctional catalyst — A catalyst with two contrasting functional components often a Lewis acid and Lewis base. Overview The broadest description of the most common definition of a bifunctional catalyst is a catalyst that contains Lewis acidic and Lewis basic component …   Wikipedia

• Migratory insertion — A migratory insertion is a type of reaction in organometallic chemistry wherein two ligands on a metal complex combine. It is a subset of reactions that very closely resembles the insertion reactions, and both are differentiated by the mechanism… …   Wikipedia

• Diels–Alder reaction — Named after Otto Paul Hermann Diels Kurt Alder Reaction type Cycloaddition Reaction …   Wikipedia

• Hafnium(IV) chloride — IUPAC name Hafnium(IV) chloride Hafnium tetrachloride …   Wikipedia