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Succinic anhydride, is an organic compound with the molecular formula (CH 2 CO) 2 O. This colorless solid is the acid anhydride of succinic acid. Preparation.
General structure of alkenyl succinic anhydrides (ASA) without stereochemistry; R 1 and R 2 are alkyl groups. Alkenyl succinic anhydrides (ASA) are derivatives of succinic anhydrides. One H of the succinic anhydride ring is replaced with an iso-alkenyl chain (C 14 to C 22). ASA's are colorless and usually viscous liquids.
Because the aromaticity is not compromised for the flanking rings, anthracene is susceptible to hydrogenation at the 9- and 10- positions. It is produced in the laboratory by dissolving metal reduction using sodium/ethanol, [3] an application of the Bouveault–Blanc reduction.
9,10-Dihydroxyanthracene is an organic compound with the formula C 14 H 10 O 2.It is the hydroquinone form of 9,10-anthraquinone (AQ). It formed when AQ is hydrogenated. [1] It is easily dissolved in alkaline solutions and is often called soluble anthraquinone (SAQ).
A common way to synthesize an NHS-activated acid is to mix NHS with the desired carboxylic acid and a small amount of an organic base in an anhydrous solvent. A coupling reagent such as dicyclohexylcarbodiimide (DCC) or 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) is then added to form a highly reactive activated acid intermediate.
Poly(ethylene succinate) (PES) is an aliphatic synthetic polyester with a melting point from 103–106 °C. It is synthesized from dicarboxylic acids; either by ring-opening polymerization of succinic anhydride with ethylene oxide or by polycondensation of succinic acid and ethylene glycol. [1]
The compound is produced by oxidation of tetrahydrophthalic anhydride. [1] ... (RN 4534-73-0), which consists of two succinic anhydride-like rings. [1] References
Blanc's Rule says that heating a barium salt of a dicarboxylic acid, or dehydrating it with acetic anhydride will yield a cyclic acid anhydride if the carbon atoms bearing acid groups are in position 1 and (4 or 5). So succinic acid will yield succinic anhydride.