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anhydride
acid anhydride
acid anhydride , chemical compound that reacts with water to form an acid (see acids and bases ). Anhydrides of inorganic acids are usually oxides of nonmetallic elements. Carbon dioxide, CO 2 , is the anhydride of carbonic acid, H 2 CO 3 . Nitrogen pentoxide, N 2 O 5 , is the anhydride of nitric acid, HNO 3 . Phosphorus pentoxide, P 2 O 5 , is the anhydride of phosphoric acid, H 3 PO 4 . Sulfur dioxide, SO 2 , is the anhydride of sulfurous acid, H 2 SO 3 . Sulfur trioxide, SO 3 , is the anhydride of sulfuric acid, H 2 SO 4 . Anhydrides of organic acids, like the acids themselves, contain the carbonyl group, CO. Organic anhydrides include acetic anhydride or ethanoic anhydride, (CH 3 C[symbol]O) 2 O, and benzoic anhydride, (C 6 H 5 C[symbol]O) 2 O.
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acid anhydride
Book article from: The Columbia Encyclopedia, Sixth Edition
acid anhydride , chemical compound...and bases ). Anhydrides of inorganic acids...SO 3 , is the anhydride of sulfuric acid, H 2 SO 4 . Anhydrides of organic acids...CO. Organic anhydrides include acetic anhydride or ethanoic anhydride...
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anhydride
Book article from: The Columbia Encyclopedia, Sixth Edition
...2 SO 4 . A basic anhydride reacts with water...hydroxide, Ca(OH) 2 . Anhydrides of organic acids...e.g., acetic anhydride, (CH 3 CO) 2 O...Other important acid anhydrides include maleic anhydride and phthalic anhydride...
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Esterification
Encyclopedia entry from: The Gale Encyclopedia of Science
...an acid chloride (R-CO-Cl) or an anhydride (R-CO-OCO-R ’ ). Early...from the reaction of an alcohol with an anhydride is important in the manufacture of drugs...gives an acid as a by-product. Acetic anhydride, CH 3 -CO-O-CO-CH 3 , a derivative...
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Polyesters
Book article from: Chemistry: Foundations and Applications
...heating glycerol and phthalic anhydride. (See Figure 3.) Because...Unsaturated oils (alcohols and anhydrides containing double bonds) were also reacted with phthalic anhydride, yielding polyesters that...the reaction of a diacid or anhydride and a diol or triol resulting...
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oxide
Book article from: The Columbia Encyclopedia, Sixth Edition
...pentoxide, P 2 O 5 , there are five. Oxides are commonly classified as acidic or basic oxides or anhydrides. Sulfur trioxide is an acid anhydride; it reacts with water to form sulfuric acid. Phosphorus pentoxide reacts vigorously with water...
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