IUPAC Naming Protocol

(I) Select the Longest Continuous Chain

Identify the longest continuous carbon chain as the parent chain. (Refer to Table 7.1.)
If there are multiple candidates with the same number of carbons, select the chain with the most substituents.

(II) Identify and Characterize the Substituents

Straight-chain alkyl groups (simple substituents) follow Table 7.2.
Branched alkyl groups (complex substituents) follow Table 7.3.

(III) Number the Carbon Atoms and Assign Positions

Single Substituent
- Number the parent chain to give the lowest number to the substituent.
Multiple Substituents
- Number the parent chain so that the lowest number is assigned to the first encountered substituent.
- If a tie occurs, consider the second substituent’s position (lowest number wins).
- If different substituents are at equivalent positions, assign numbers alphabetically.

(IV) Indicating Multiple Identical Substituents

If a substituent appears more than once, use prefixes:
- di, tri, tetra, penta, hexa, etc.
If identical substituents attach to the same carbon, cite the carbon number for each instance.

Notes on Writing IUPAC Names

Alphabetize substituents when writing the name.
Ignore numerical prefixes (di, tri, tetra, etc.) when alphabetizing.
Hyphens (-) separate numbers from letters.
Commas (,) separate numbers.