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Organic Chemistry

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Ethane: C2H6, CH3CH3<br />

2.1 Alkanes — Nomenclature<br />

IUPAC Rules for Naming Alkanes<br />

1. Name the longest continuous chain.<br />

2. Name groups attached to this chain.<br />

3. Number the carbon’s in this chain. (so that side groups<br />

are given smallest number possible)<br />

4. Designate each group with correct number and name.<br />

5. Assemble name, listing groups in alphabetical order.<br />

Structural formula Line formula Formula<br />

name<br />

CH4<br />

Methane<br />

C2H6<br />

Ethane<br />

C3H8<br />

Propane<br />

C4H10<br />

Butane<br />

C5H12<br />

Pentane<br />

C6H14<br />

Hexane<br />

Condensed formula<br />

CH4<br />

CH3CH3<br />

CH3CH2CH3<br />

CH3CH2CH2CH3<br />

CH3CH2CH2CH2CH3<br />

CH3CH2CH2CH2CH2CH3

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