acetal

acetal
Product of the addition of 2 mol of alcohol to one of an aldehyde, thus : RCHO + 2R′OH → RCH(OR′)2 + H2O; in mixed acetals ( e.g., glycosides), two different alcohols are bound to the original aldehyde group. SEE ALSO: hemiacetal, hemiketal, ketal.

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ac·e·tal 'as-ə-.tal n any of various compounds characterized by the group C(OR)2 and obtained esp. by heating aldehydes or ketones with alcohols

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ac·e·tal (asґə-təl) any of a class of organic compounds of the formula RCH(OR′)2, where R and R′ are organic radicals, formed by combination of an aldehyde molecule with two alcohol molecules. CH3CH(OC2H5)2, a colorless volatile liquid used as a solvent and in cosmetics.

Medical dictionary. 2011.

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  • acétal — ● acétal, acétals nom masculin (allemand acetal ; du latin acet(um), vinaigre, et de l allemand al[kohol]) Nom générique des diéthers dérivant des aldéhydes et des cétones. ● acétal, acétals (difficultés) nom masculin (allemand acetal ; du latin… …   Encyclopédie Universelle

  • Acétal — et cétal Les acétals sont obtenus par addition nucléophile d un alcool sur un aldéhyde en milieu acide, suivie d une élimination d eau. Les cétals sont obtenus par le même type de réaction effectuée sur les cétones. Voici un exemple mettant en… …   Wikipédia en Français

  • Acetal — Ac e*tal, n. [Acetic + alcohol.] (Chem.) A limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black. [1913 Webster] …   The Collaborative International Dictionary of English

  • Acetal — (Chem.), C12H14O4, entsteht, wenn über einer, 60–80 Proc. Alkohol enthaltenden Schale in Uhrgläsern angefeuchtetes, auf nassem Wege reducirtes Platin aufgestellt, das Ganze mit einer, in dem Alkohol stehenden Glasglocke bedeckt u. mehrere Wochen… …   Pierer's Universal-Lexikon

  • Acetāl — (Äthylidendiäthyläther) C6H14O2 oder CH3.CH(OC2H5)2 findet sich in durch Kohle filtriertem Rohspiritus, im Vorlauf der Spiritusrektifikation und in alten Weinen; es entsteht bei Oxydation von Alkohol mit Braunstein und verdünnter Schwefelsäure,… …   Meyers Großes Konversations-Lexikon

  • acetal — 1. líquido incoloro C2H4(OC2H5)2, usado a veces como hipnótico. También llamado dietilacetal. 2. cualquier compuesto con fórmula general R2C(OR)2 o RCH(OR)2, donde R indica un grupo alquilo o arilo. Diccionario Mosby Medicina, Enfermería y… …   Diccionario médico

  • acetal — s. m. Produto da oxidação do álcool (líquido incolor de cheiro etéreo) …   Dicionário da Língua Portuguesa

  • acetal — m. Quím. Producto resultante de la reacción entre un aldehído y un alcohol …   Diccionario de la lengua española

  • acetal — [as′i tal΄] n. [ ACET(O) + AL] any of a class of organic compounds; esp., CH3CH(OC2H5) 2, a colorless, slightly soluble, volatile liquid formed by the partial oxidation of ethyl alcohol: used as a solvent, in organic synthesis, and sometimes as a …   English World dictionary

  • Acetal — For the plastic, see Polyoxymethylene plastic. Not to be confused with Acetyl. Structure of a generic acetal …   Wikipedia

  • Acetal — Estructura de un acetal genérico …   Wikipedia Español

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