Esterification is when an alcohol and a carboxylic acid react together (with sulphuric acid as a catalyst) to form an ester.
Example:
Butanol (alcohol) + pentanoic acid (carboxylic acid) --> butyl pentanoate (ester)
Source: Chemistry: The Study of Matter and Change by James E. Brady and John R. Holum
Dehydration is the reaction involved when esters are made. You start with a molecule with a hydroxyl group (-OH), like glucose. Esterification brings hydroxyl groups from each of two molecules together:
glu-OH HO-glu
The hydroxyl is removed from one molecule, and the hydrogen from the other:
glu-O- -glu H- -OH -------> glu-O-glu + H2O
And everything fits together: a new ester, and an extra water molecule. Since a water was removed in the process, this is a dehydration reaction.
Esterification is the chemical process for making esters which are compounds of another chemical structure. The process involved is heating a carboxylic acid with an alcohol which removes the water that is formed.
Acid-base-catalysed hydrolyses are very common; one example is the hydrolysis of amides or esters. Their hydrolysis occurs when the nucleophile (a nucleus-seeking agent, e.g., water or hydroxyl ion) attacks the carbon of the carbonyl group of the ester or amide. In an aqueous base, hydroxyl ions are better nucleophiles than polar molecules such as water. In acids, the carbonyl group becomes protonated, and this leads to a much easier nucleophilic attack. The products for both hydrolyses are compounds with carboxylic acidgroups.
Perhaps the oldest commercially practiced example of ester hydrolysis is saponification (formation of soap). It is the hydrolysis of atriglyceride (fat) with an aqueous base such as sodium hydroxide (NaOH). During the process, glycerol is formed, and the fatty acidsreact with the base, converting them to salts. These salts are called soaps, commonly used in households.
In addition, in living systems, most biochemical reactions (including ATP hydrolysis) take place during the catalysis of enzymes. The catalytic action of enzymes allows the hydrolysis of proteins, fats, oils, and carbohydrates. As an example, one may considerproteases (enzymes that aid digestion by causing hydrolysis of peptide bonds in proteins). They catalyse the hydrolysis of interior peptide bonds in peptide chains, as opposed to exopeptidases (another class of enzymes, that catalyse the hydrolysis of terminal peptide bonds, liberating one free amino acid at a time).
However, proteases do not catalyse the hydrolysis of all kinds of proteins. Their action is stereo-selective: Only proteins with a certain tertiary structure are targeted as some kind of orienting force is needed to place the amide group in the proper position for catalysis. The necessary contacts between an enzyme and its substrates (proteins) are created because the enzyme folds in such a way as to form a crevice into which the substrate fits; the crevice also contains the catalytic groups. Therefore, proteins that do not fit into the crevice will not undergo hydrolysis. This specificity preserves the integrity of other proteins such as hormones, and therefore the biological system continues to function normally.
Upon hydrolysis, an amide converts into a carboxylic acid and an amine or ammonia. The carboxylic acid has a hydroxyl group derived from a water molecule and the amine (or ammonia) gains the hydrogen ion. The hydrolysis of peptides gives amino acids.
Many polyamide polymers such as nylon 6,6 hydrolyse in the presence of strong acids. The process leads to depolymerization. For this reason nylon products fail by fracturing when exposed to small amounts of acidic water. Polyesters are also susceptible to similarpolymer degradation reactions. The problem is known as stress corrosion cracking.
When Esters are commonly formed by reaction of an acid and an alcohol. Ethanoic acid reacts with absoloute ethanol to give an ester.
Esterification is a reaction of a caboxylic acid with an alcohol, in the presence of a dehydrating agent (e.g. sulfuric acid).
Organic Acids
esterification
Such compounds are mostly esters.
Synthesis is the chemical reaction that is involved in the preparation of the Thiazin from Chalcone.
It represents the heat involved in a reaction.
esters are usually prepared industrially by reaction of corresponding carboxylic acid and alcohol.
Organic Acids
esterification
It is a group of chemical compounds. Esters are always formed by the reaction of acid and alcohol. There can be esters of organic acids and inorganic acids
Esters are formed by the reaction of an alcohol and a carboxylic acid, usually in the presence of sulfuric acid to catalyse the process, or by the reaction of an acyl chloride with a carboxylic acid (this requires no catalyst and is irreversible without additional reactants) are the most common ways used. Others include reactions of certain molecules such as structural rearrangement.
esterification is the formation of esters between the reaction of alkanol and alkanoic acid
When the reaction of sodium phenoxide and sulforic acid occurs, the esters are usually produced.
glycerol esters mixed with oils.
Mostly aromatic esters.
It depends which alcohol the acid has combined with.
Such compounds are mostly esters.
Organic Molecules are involved in the sense of smell; specifically esters, amines, ketones, and even aldehydes.