Esterification is the general name for a chemical reaction in which two chemicals (typically an alcohol and an acid) form an ester as the reaction product. These are commonly used as fragrance or flavour agents. Esterification is a reversible reaction. Hydrolysis- literally "water splitting" involves adding water and a catalyst (commonly NaOH) to an ester to get the sodium salt of the carboxylic acid and alcohol. A chemical reaction occurs when vapours of hydrogen chloride in a beaker and ammonia in a test tube meet to form a cloud of a new substance, ammonium chloride A chemical reaction is a process that results in the interconversion of chemical substances [1]. The substance or substances initially involved... General formula of a carboxylate ester. ... In chemistry, the product(s) is/are formed when the reactant(s), also known as Educt(s), react with each other by overcoming the activation energy of a chemical reaction. ... Odor receptors on the antennae of a Luna moth An odor is the object of perception of the sense of olfaction. ... Flavouring (CwE) or flavoring (AmE) is a product which is added to food in order to change or augment its taste. ...
Examples of esterification reactions include:
Heating to reflux an acid (usually, but not always a carboxylic acid) and an alcohol in the presence of a catalyst (commonly H2SO4) forms the ester and water byproduct which can be removed to force the equibilibrium across to the desired products. This method is called Fischer esterification
H3C-COOH + HO-CH2-CH3 → H3C-COO-CH2-CH3 + H2O (with the presence of conc. sulfuric acid) Diagram of typical reflux apparatus. ... An organic acid is an organic compound that is an acid. ... Structure of a carboxylic acid The 3D structure of the carboxyl group A space-filling model of the carboxyl group Carboxylic acids are organic acids characterized by the presence of a carboxyl group, which has the formula -C(=O)OH, usually written -COOH or -CO2H. [1] Carboxylic acids are Bronsted... Functional group of an alcohol molecule. ... It has been suggested that this article or section be merged into Catalysis. ... Fischer esterification is the process of forming an ester by refluxing a carboxylic acid and an alcohol in the presence of an acid (catalyst). ... Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent smell. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ... Sulfuric acid (British English: sulphuric acid), H2SO4, is a strong mineral acid. ... Ethyl acetate is the organic compound with the formula CH3CH2OC(O)CH3. ... Sulfuric acid (British English: sulphuric acid), H2SO4, is a strong mineral acid. ...
H3C-COO- Na+ + HO-CH2-CH3 + H+ → H3C-COO-CH2-CH3 + H2O + Na+ Functional group of an alcohol molecule. ... Sodium acetate, also known as sodium ethanoate, is used in a number of industries: Textile industry: to neutralize sulphuric acid and as a resist to aniline dyes Leather industry: as a pickling agent in chrome tanning Chemical industry: in the manufacture of diazo compounds Paper industry: as a buffering agent... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ...
H3C-CO2-Ag+ + Cl-CH2-CH3 → H3C-COO-CH2-CH3 + AgCl Haloalkane, halogenoalkanes or alkyl halides are compounds derived from alkanes by substituting one or more hydrogen atoms with halogen atoms. ... Solubility refers to the ability for a given substance, the solute, to dissolve in a solvent. ... A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ...
The reaction of a carboxylic acid halogenide (which is also called acyl halide) with an alcohol/phenol.
H3C-COCl + HO-CH2-CH3 → H3C-COO-CH2-CH3 + H-Cl An acyl halide (also known as an acid halide) is an organic compound containing a carbon atom which is double_bonded to an oxygen atom and singly bonded to a chlorine atom. ...
The reaction of a carboxylic acid anhydride with an alcohol. (This method is used to synthesize aspirin)
H3C-CO-O-CO-CH3 + HO-CH2-CH3 → H3C-COO-CH2-CH3 + H3C-COOH In chemistry, an anhydride is a compound that can be considered as derived from another compound by subtracting the atoms of water. ... Aspirin or acetylsalicylic acid (acetosal) is a drug in the family of salicylates, often used as an analgesic (against minor pains and aches), antipyretic (against fever), and anti-inflammatory. ...
See also
Transesterification, a reaction to transform one ester into a different ester.
Hydrolysis, the cleavage of an ester with water back to a carboxylic acid and alcohol.
Esterification is the general name for a chemical reaction in that an ester is the reaction product.
the Fischer esterification (refluxing a carboxylic acid and an alcohol in the presence of an acidcatalyst) in the absence of water with alcohol/phenole
Process for the esterification of organic acids with alcohols in a reactor of the chromatographic type in which the heterogeneous solid phase is capable of acting both as an esterificationcatalyst and as a means exhibiting preferential adsorption towards one of the reaction products (typically water).
Esterification reactions are limited by a chemical equilibrium and therefore techniques for the industrial preparation of an ester involve two consecutive steps.
In the case of carboxylic acids that are soluble under the esterification reaction conditions, the organic solvent is normally the carboxylic acid; alternatively, in the case of carboxylic acids that are insoluble and alcohols that are soluble under the esterification reaction conditions, the organic solvent is the alcohol
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