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Showing 1 to 7 of 7 for “"Acid anhydrides"”.
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Sulfur Rich Transition Metal-Main Group Heterocycles and Cages
… is that observed for the organoperthiophosphinic acid anhydrides, R(,2)P(,2)S(,4), 1. These anhydrides are one of the most efficient reagents known for the thiation of organic carbonyl compounds.
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Binding, activation, and transformation of carbon dioxide mediated by anionic metal complexes
… with typical dehydrating reagents, e.g organic acid anhydrides, is shown to proceed cleanly when cobaltocene, acting as an in situ reductant, is present to form the vanadium(IV) isocyanate complex (OCN)V(N['Bu]Ar) 3. The synthesis and structure of the bimetallic complex (TPP)MnOC(O)NV(N['Bu]Ar) …
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Isocyanate-derived organic aerogels: polyurethanes, polyureas, polyamides and polyimides
… (b) water (polyureas); (c) carboxylic acids (polyamides); and, (d) acid anhydrides (polyimides). All processes are invariably single-step, one-pot and take place at room temperature or slightly elevated temperatures. The resulting materials are robust, they have very wide range of …
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Some aspects of the chemistry of 1, 3, 4 - Thiadiazolium salts and related compounds
… salts by the action of perchloric acid/acetic anhydride on N'-acylN'- aryl-N-benzothiohydrazides and also by the reaction of N'-arylN- benzothiohydrazides with nitriles in an acidic medium. The preparation of 2-methylthio-I,3,4-thiadiazolium methosulfate by methylating the …
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Synthesis of Insecticidal Mono- and Diacylhydrazines for Disruption of K+ Voltage-Gated Channels, and Elucidation of Regiochemistry and Conformational Isomerism by NMR Spectroscopy and Computation
… agent in the presence of various bases. Acid anhydrides gave consistent preference for distal acylation. The selectivity of acylation by acyl chlorides when using pyridine gives strong distal preference, whereas use of triethylamine or aqueous base in conjunction with aroyl chlorides …
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A kinetic study of the base catalyzed esterification of propionic anhydride with isopropyl and n-propyl alcohols using a high frequency oscillometer
… lower aliphatic esters and esters of chloracetic acid have been measured (Elving 1954; Flom and Elving 1953).</p> <p>The published kinetic -studies using this type instrument have been done in aqueous solution. The principle instrumental effect in these studies is conductometric, whereas the …