ion condensation

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• Ion Radicalaire — Un ion radicalaire est une espèce radicalaire libre portant une charge. Ces espèces se rencontrent principalement en chimie organique comme intermédiaires de réaction Anions radicalaires De nombreux composés aromatiques peuvent subir une… …   Wikipédia en Français

• condensation — condensational, adj. condensative, adj. /kon den say sheuhn, deuhn /, n. 1. the act of condensing; the state of being condensed. 2. the result of being made more compact or dense. 3. reduction of a book, speech, statement, or the like, to a… …   Universalium

• Ion exchange resin — An ion exchange resin is an insoluble matrix (or support structure) normally in the form of small (1 2 mm diameter) beads, usually white or yellowish, fabricated from an organic polymer substrate. The material has highly developed structure of… …   Wikipedia

• Ion radicalaire — Un ion radicalaire est une espèce radicalaire libre portant une charge. Ces espèces se rencontrent principalement en chimie organique comme intermédiaires de réaction Anions radicalaires De nombreux composés aromatiques peuvent subir une… …   Wikipédia en Français

• condensation reaction — ▪ chemical reaction       any of a class of organic reactions in which two molecules combine, usually in the presence of a catalyst, with elimination of water or some other simple molecule. The combination of two identical molecules is known as… …   Universalium

• Aldol condensation — An aldol condensation is an organic reaction in which an enol or an enolate ion reacts with a carbonyl compound to form a β hydroxyaldehyde or β hydroxyketone, followed by a dehydration to give a conjugated enone. Aldol condensations are… …   Wikipedia

• Self-condensation — is an organic reaction in which a chemical compound containing a carbonyl group acts both as the electrophile and the nucleophile in an aldol condensation. It is also called a symmetrical aldol condensation as opposed to a mixed aldol… …   Wikipedia

• Benzoin condensation — The benzoin condensation is a condensation reaction between two aromatic aldehydes, particularly benzaldehyde. The reaction is catalyzed by a nucleophile such as the cyanide anion or an N heterocyclic carbene. The reaction product is an aromatic… …   Wikipedia

• Knoevenagel condensation — The Knoevenagel condensation reaction is an organic reaction named after Emil Knoevenagel. It is a modification of the Aldol condensation[1][2]. A Knoevenagel condensation is a nucleophilic addition of an active hydrogen compound to a carbonyl… …   Wikipedia

• Radical ion — A radical ion is a free radical species that carries a charge.[1] Radical ions are encountered in organic chemistry as reactive intermediates and in mass spectrometry as gas phase ions. Positive radical ions are called radical cations whereas… …   Wikipedia

• 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