IUPAC Naming Helper - Calculator Suite

Alkane Naming Practice

Number of Carbon Atoms:

Branching Pattern:

Custom Substituents (if selected):

Functional Group Nomenclature

Functional Group:

Carbon Chain Length:

Position of Functional Group:

Molecular Formula to Name

Molecular Formula:

Additional Information:

Naming Rules Reference

IUPAC Priority Order:

1. Carboxylic acids (-COOH) → -oic acid

2. Esters (-COO-) → -oate

3. Amides (-CONH₂) → -amide

4. Aldehydes (-CHO) → -al

5. Ketones (C=O) → -one

6. Alcohols (-OH) → -ol

7. Amines (-NH₂) → -amine

Basic Steps:

1. Find the longest carbon chain

2. Identify the principal functional group

3. Number the chain (lowest numbers for functional group)

4. Name substituents alphabetically

5. Combine: (substituents)-(root)-(suffix)

Carbon Chain Prefixes:

1: meth-

2: eth-

3: prop-

4: but-

5: pent-

6: hex-

7: hept-

8: oct-

Common Examples and Practice

Alkane Examples:

CH₄ → methane

C₂H₆ → ethane

C₃H₈ → propane

C₄H₁₀ → butane (straight) or 2-methylpropane (branched)

C₅H₁₂ → pentane, 2-methylbutane, or 2,2-dimethylpropane

Functional Group Examples:

CH₃OH → methanol

CH₃CHO → ethanal (acetaldehyde)

CH₃COCH₃ → propanone (acetone)

CH₃COOH → ethanoic acid (acetic acid)

CH₃CH₂NH₂ → ethylamine

Complex Examples:

2-methylbutan-1-ol → 4-carbon chain, methyl at position 2, alcohol at position 1

3-ethylpentan-2-one → 5-carbon chain, ethyl at position 3, ketone at position 2

2,3-dimethylbutanoic acid → 4-carbon chain, two methyls, carboxylic acid

🧪 IUPAC Naming Helper