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carboxylic acids/derivates saturated carboxylic acids 1710 unsat./aromatic carb. acids 1680–1690 esters and lactones: 1735 influenced by conjugation and ring size (as with ketones) anhydrides 1760 1820 acyl halides: 1800 amides: 1650 associated amides carboxylates (salts) 1550–1610 amino acid zwitterions 1550–1610 O─H alcohols, phenols
In organic chemistry, a carboxylic acid is an organic acid that contains a carboxyl group (−C(=O)−OH) [1] attached to an R-group. The general formula of a carboxylic acid is often written as R−COOH or R−CO 2 H, sometimes as R−C(O)OH with R referring to an organyl group (e.g., alkyl, alkenyl, aryl), or hydrogen, or other groups ...
Infrared spectroscopy: the C=O double bond absorbs infrared light at wavenumbers between approximately 1600–1900 cm −1 (5263 nm to 6250 nm). The exact location of the absorption is well understood with respect to the geometry of the molecule. This absorption is known as the "carbonyl stretch" when displayed on an infrared absorption ...
2-Chloropropionic acid (2-chloropropanoic acid) is the chemical compound with the formula CH 3 CHClCO 2 H. This colorless liquid is the simplest chiral chloro carboxylic acid , and it is noteworthy for being readily available as a single enantiomer .
The systematic IUPAC name is not always the preferred IUPAC name, for example, lactic acid is a common, and also the preferred, name for what systematic rules call 2-hydroxypropanoic acid. This list is ordered by the number of carbon atoms in a carboxylic acid.
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O.Commonly abbreviated Ac 2 O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis.
Reaction with carboxylic acids to form mixed anhydrides: ROC(O)Cl + HO 2 CR' → ROC(O)−OC(O)R' + HCl. Typically these reactions would be conducted in the presence of a base which serves to absorb the HCl. Alkyl chloroformate esters degrate to give the alkyl chloride, with retention of configuration: ROC(O)Cl ' → RCl + CO 2
2-Furoic acid crystals are highly transparent in the 200–2000 nm wavelength region, are stable up to 130 °C, and generally have low absorption in the UV, visible, and IR ranges. [13] In optical and dielectric studies, 2-furoic acid crystals may act as paraelectrics in the temperature range < 318 K and ferroelectrics in temperature ranges ...