Table of Contents
Carboxylic Acid Uses ; Classes of Carboxylic Acid ; Synthesis of Carboxylic Acid
Uses of Carboxylic Acid | Structure and Properties of Carboxylic Acid.
Carboxylic acids are organic acids that contain a carboxyl group (COOH). The simplest carboxylic acid is formic acid (HCOOH), which is found in ants and wasps. Other carboxylic acids include acetic acid (CH3COOH), which is found in vinegar, and propionic acid (CH3CH2COOH), which is found in butter.
Carboxylic acids are used in a variety of industries. In the food industry, they are used as flavorings and preservatives. In the pharmaceutical industry, they are used to make drugs and to coat pills. In the textile industry, they are used to make fabrics softer and more absorbent. In the metalworking industry, they are used to clean metal parts.
There are many classes of carboxylic acids. The most important classes are the organic acids, the inorganic acids, and the fatty acids.
Organic acids are the most important class of carboxylic acids. They are the acids that are found in living things. The most important organic acids are the carboxylic acids, the aldehydes, and the ketones.
Inorganic acids are the acids that are found in inorganic substances. The most important inorganic acids are the mineral acids and the hydrohalic acids.
Fatty acids are the acids that are found
Nomenclature
of an Organic Compound
An organic compound is a molecule that contains carbon. The carbon atom can form covalent bonds with other atoms, including other carbon atoms. Organic molecules are found in all living things and make up the bulk of the human body.
Organic molecules are classified by their structure. There are many different types of organic molecules, but they can be broadly divided into two categories: carbon chains and carbon rings.
Carbon chains are made of a series of carbon atoms linked together by covalent bonds. The simplest carbon chain is methane, CH4. Carbon chains can be short or long, and they can have any number of carbon atoms.
Carbon rings are made of a series of carbon atoms linked together by covalent bonds, with at least one ring of carbon atoms. The simplest carbon ring is cyclohexane, C6H12. Carbon rings can be small or large, and they can have any number of carbon atoms.
Physical Properties
The physical properties of a material determine how it behaves when it is heated or cooled, how it responds to forces, and how it interacts with other materials. Some common physical properties include density, melting point, boiling point, and strength.
Solubility
The solubility of a substance is the maximum amount of that substance that can dissolve in a given amount of solvent.
Boiling Points
The boiling points of the elements are listed in the table below.
Boiling Point (°C) Element 1 Ammonia -33 2 Hydrogen -253 3 Lithium -180 4 Neon -246 5 Sodium -97 6 Magnesium -203 7 Aluminum -660 8 Silicon -1410 9 Phosphorus -44 10 Sulfur -112
Acidity
The taste of a food or drink that is sour.
Acidic
A sour, acidic taste.
Odour
less and tasteless
This product is odourless and tasteless, making it ideal for use in a range of applications.
Saturated Aliphatic Acids
Saturated aliphatic acids have the general formula CH 3 (CH 2 ) n COOH, where n is an integer from 1 to about 8. They are all colorless, odorless, and water-soluble. The simplest, methyl formate (HCOOCH 3 ), is a liquid at room temperature. The others are all solids.
The most important saturated aliphatic acids are formic acid (HCOOH), acetic acid (CH 3 COOH), propionic acid (CH 3 CH 2 COOH), butyric acid (CH 3 CH 2 CH 2 COOH), and valeric acid (CH 3 CH 2 CH 2 CH 2 COOH). These acids are used in the manufacture of plastics, fibers, solvents, and other chemicals. They are also used as food additives and in the fermentation of alcoholic beverages.
Unsaturated Aliphatic Acids
Unsaturated aliphatic acids are a type of organic acid that contains one or more carbon-carbon double bonds. These acids are found in plant oils and are responsible for the oil’s characteristic odor. Unsaturated aliphatic acids are also used in the production of plastics, paints, and other industrial products. Some common unsaturated aliphatic acids include oleic acid, linoleic acid, and linolenic acid.
Aromatic Acids
Aromatic acids are a type of organic compound that contain a benzene ring. The most common aromatic acids are benzoic acid and phenylacetic acid.
Polycarboxylic Acid
A polycarboxylic acid is an organic compound that contains at least three carboxylic acid groups. These acids are often used as detergents and wetting agents, and they are also found in some foods.
Hydroxyl and Keto Acid
Rearrangements
The rearrangement of a hydroxy group and a keto group on the same molecule is called a keto-enol tautomerism. The keto form is the most stable, and the enol form is the most unstable.
Amino Acids
Amino acids are the building blocks of protein. They are organic molecules that contain a carbon atom, an nitrogen atom, and a hydrogen atom. The carbon atom is bonded to four different groups: an amino group, a carboxyl group, a hydrogen atom, and a variable group. The variable group can be any one of 20 different groups.
There are 20 different amino acids. They are listed below, along with the variable group of each one.
amino group: -NH2
carboxyl group: -COOH
hydrogen atom: -H
variable group:
alanine: -CH3
arginine: -CH(NH2)3
aspartic acid: -CH2COOH
cysteine: -CH2SH
glutamic acid: -CH2CH2COOH
glycine: -CH2NH2
histidine: -CH2NHCH2COOH
hydroxyproline: -CH2OH
isoleucine: -CH2CH(CH3)2
leucine: -CH2CH2CH2CH3
lysine: -CH2CH(NH2)2
methionine: -CH2SCH3
phenylalanine: -CH2C6H5
proline: -CH2NH2
serine: -CH2OH
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Ozonolysis of Alkenes
The ozonolysis of an alkene produces an ozonide and an alcohol. The ozonide is a three-membered ring containing an oxygen atom.
Carbonation of Grignards
When a Grignard reagent is reacted with carbon dioxide, a carbonate is produced. For example, when magnesium is reacted with carbon dioxide, magnesium carbonate is produced:
Mg + CO 2 → MgCO 3
Oxidation of 1o Alcohols
In the presence of a strong oxidizing agent, 1o alcohols are oxidized to aldehydes or ketones. The oxidizing agent can be potassium dichromate (K2Cr2O7), chromium trioxide (CrO3), or an oxygen-containing gas, such as ozone (O3) or nitrous oxide (N2O).
The following reaction shows the oxidation of ethanol to acetaldehyde.
2CH3CH2OH + 3O2 → 2CH3CHO + 2H2O
The following reaction shows the oxidation of propanol to propionaldehyde.
CH3CH2CH2OH + 3O2 → CH3CHOCH2CH3 + 2H2O
Oxidation of Aldehydes and Ketones
Aldehydes and ketones can be oxidized to carboxylic acids. The oxidation can be done with a variety of oxidizing agents, but the most common is chromic acid in sulfuric acid.
The mechanism for the oxidation of aldehydes and ketones is the same. The oxidizing agent attacks the carbon atom adjacent to the carbonyl group. This carbon atom is then oxidized to a carboxylic acid.
Summary:
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Oxidation of Alkyl Benzene
Sulfonates
The oxidation of alkyl benzene sulfonates (ABS) to the corresponding sulfonic acids can be achieved by various methods. In one method, an aqueous solution of ABS is mixed with aqueous potassium permanganate (KMnO4) and the mixture is heated. The KMnO4 oxidizes the ABS to the sulfonic acids.
In another method, a solution of ABS in an organic solvent is mixed with a solution of hydrogen peroxide (H2O2) and the mixture is heated. The H2O2 oxidizes the ABS to the sulfonic acids.
Spectroscopic Analysis:
The spectroscopic analysis of the compound confirmed the presence of an aromatic ring.
The IR spectrum showed a strong absorption peak at 1600 cm-1, corresponding to the aromatic ring.
The NMR spectrum showed a single peak at 7.5 ppm, corresponding to the aromatic ring.
Mass Spectrometry
Mass spectrometry (MS) is a technique that uses a mass spectrometer to determine the mass-to-charge ratio of ions. MS can be used to identify unknown compounds, to determine the composition of a mixture, or to determine the structure of a compound.
In a mass spectrometer, an electric field is used to accelerate ions to a high speed. The ions then pass through a magnetic field, which causes them to rotate. The rotation of the ions is measured, and the mass-to-charge ratio is determined from the rotation.
Uses of Carboxylic Acid
Carboxylic acids are used in a variety of industries. In the food industry, carboxylic acids are used as food additives and flavorings. In the pharmaceutical industry, carboxylic acids are used as active ingredients in medications. In the personal care industry, carboxylic acids are used in skin care products.
Uses of Carboxylic Acid | Structure and Properties of Carboxylic Acid.