Table of Contents
What is a Carboxyl Group?
Carboxyl Group – Examples: A carboxyl group is a functional group present in organic molecules that consists of a carbon atom double-bonded to an oxygen atom, and single-bonded to a hydroxyl group. The carboxyl group is responsible for the sour taste of many organic molecules and is also responsible for the ability of these molecules to participate in chemical reactions that involve the transfer of protons (hydrogen ions).
Carboxyl Group Examples
The carboxyl group is a functional group found in organic molecules. It is composed of a carbon atom bonded to an oxygen atom and also a hydrogen atom. The carboxyl group is represented by the symbol -COOH.
The carboxyl group is responsible for the sour taste of many organic molecules, such as vinegar and citrus fruits. It is also responsible for the characteristic acidic properties of these molecules. The carboxyl group can react with other molecules to form esters or carboxylic acids.
Carboxyl Group Formula
The carboxyl group is a functional group of organic molecules that consists of a carbon atom double-bonded to an oxygen atom, with a single bond to an oxygen atom attached to the carbon. It is also known as a carboxylic acid group. Therefore the carboxyl group is responsible for the sour taste of acids and the acidic properties of organic molecules.
Nomenclature of Carboxylic Acids
The nomenclature of carboxylic acids is based on the IUPAC system of naming organic compounds. Therefore in this system, the name of the carboxylic acid is based on the name of the alkane or alkene from which it is derived, with the suffix -ic acid added.
For example, the carboxylic acid derived from ethane named ethanoic acid, and the acid derived from propane is named propanoic acid. If the carboxylic acid derived from an alkyne, the suffix -oic acid used instead of -ic acid.
Therefore the carboxylic acid derived from propyne named propynoic acid.
Structure of Carboxyl Group
The carboxyl group is a COOH functional group. However it is a polar, acidic group that found in many organic molecules. The carboxyl group can ionized to form a carboxylate ion, CO2-2.
Properties of Carboxyl Group
- The carboxyl group (-COOH) is a functional group present in all carboxylic acids.
- It is a polar group due to the electronegativity of oxygen.
- The carboxyl group is a hydrophilic group due to its polar nature.
- It is a reactive group and can participate in many chemical reactions.
Carboxyl Group from Nature
The carboxyl group (-COOH) a functional group found in many biomolecules. It is responsible for the acidic properties of these molecules. Therefore the carboxyl group can found in amino acids, peptides, and proteins. It can also found in lipids and carbohydrates.
Uses of Carboxylic Acids
The most common use of carboxylic acids is as a component of esters. For example, acetic acid is the component of vinegar. Carboxylic acids also used as reactants in the production of polyesters.
The Acidity of Carboxylic Acids:
The acidity of a carboxylic acid determined by the strength of the carbon-hydrogen bond. Therefore the stronger the carbon-hydrogen bond, the more acidic the carboxylic acid.
Expected Questions on Carboxylic Acids:
1. What is the simplest carboxylic acid?
2. What is the molecular formula of acetic acid?
3. What is the structural formula of acetic acid?
4. What is the IUPAC name of acetic acid?
5. Acetic acid is a _____ acid.
6. What is the melting point of acetic acid?
7. What is the boiling point of acetic acid?
8. Acetic acid is soluble in _____.
9. What is the acid dissociation constant of acetic acid?
10. And also What is the pKa of acetic acid?
