IUPAC
International Union of Pure and
Applied Chemistry
• Standardized rules to avoid duplicate names
• a unique name for Compounds
Important Terminology
• Alkanes - saturated hydrocarbons
How to name organic compounds using the
IUPAC rules
• Determine the longest carbon chain. In cyclic compounds, the ring is
usually considered the parent chain, unless it is attached to a longer
chain of carbons; indicate a ring with the prefix “cyclo” before the roo
name
• Assign numbers to each C of the parent chain
• Naming Side Chains
• Indicate the number of identical groups by the prefixes di, tri, tetra etc.
• Identify all of the substituents (groups appending from the parent chain).
• Attach a prefix Place the position numbers and names of the substituents
groups, in alphabetical order, before the root name. In alphabetizing,
ignore prefixes like sec-, tert-, di, tri, etc., but include iso and cyclo
• Alkanes - saturated hydrocarbons
How to name organic compounds using the
IUPAC rules
• Determine the longest carbon chain. In cyclic compounds, the ring is
usually considered the parent chain, unless it is attached to a longer
chain of carbons; indicate a ring with the prefix “cyclo” before the roo
name
• Assign numbers to each C of the parent chain
• Naming Side Chains
• Indicate the number of identical groups by the prefixes di, tri, tetra etc.
• Identify all of the substituents (groups appending from the parent chain).
• Attach a prefix Place the position numbers and names of the substituents
groups, in alphabetical order, before the root name. In alphabetizing,
ignore prefixes like sec-, tert-, di, tri, etc., but include iso and cyclo