In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a systematic method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC). It is published in the Nomenclature of Organic Chemistry (informally called the Blue Book).

IUPAC nomenclature is a form of nomenclature in which naming of a compound is done by a union of bonafide prof. of chemistry on the basis of several principles .

so it is also known as International union of pure and Applied chemistry.

That's all

IUPAC Nomenclature
IUPAC (International Union of Pure and Applied Chemistry) nomenclature is a systematic method for naming chemical compounds. It provides a unique name for each compound, enabling clear communication in the scientific community.
Key Principles of IUPAC Nomenclature
- Hierarchy of Functional Groups
The naming process prioritizes functional groups based on their reactivity and importance. The highest priority group dictates the compound's suffix.
- Longest Carbon Chain
Identify the longest continuous chain of carbon atoms, known as the parent chain. This chain determines the base name of the compound.
- Numbering the Chain
Assign numbers to the carbon atoms in the parent chain, starting from the end nearest to the highest priority functional group. This numbering helps in identifying the position of substituents.
- Naming Substituents
Identify and name all substituents (branches) attached to the parent chain. Use prefixes like "methyl," "ethyl," or "propyl" to describe them.
- Combining Names
Combine the names of the substituents and the parent chain. Substituents are listed in alphabetical order, irrespective of their position numbers. Use commas and hyphens appropriately.
Examples of IUPAC Naming
- Alkanes
Example: C5H12 is named "pentane."
- Alkenes and Alkynes
Example: C3H6 is named "propene," while C3H4 is "propyne."
- Functional Groups
Example: CH3COOH is named "ethanoic acid" (acetic acid).
Importance of IUPAC Nomenclature
- Standardization
Provides a universally accepted naming system to avoid confusion.
- Clear Communication
Facilitates effective communication among chemists worldwide.
Understanding IUPAC nomenclature is essential for studying and communicating chemical information accurately.