NAMING ALCOHOLS
1.All alcohol members have a suffix 'ol'. For example,
methanol, ethanol, propanol ......
2.The nomenclatu...
Example 2
(Pentan-1-ol)
Longest chain: 5 carbon (pentanol)
Position of hydroxyl group: 1
Alkyl: -
Example 3
(2-methylpropa...
Example 4
(3-methylbutan-1-ol)
Longest chain: 4 carbon (butanol)
Position of hydroxyl group: at C1
Alkyl: Methyl at 3rd ca...
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Naming alcohols

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Published on: Mar 3, 2016
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Transcripts - Naming alcohols

  • 1. NAMING ALCOHOLS 1.All alcohol members have a suffix 'ol'. For example, methanol, ethanol, propanol ...... 2.The nomenclature of alcohol, like alkanes, is based on the number of carbon atoms in the molecule, but the 'e' in the nomenclature of alkanes is replaced with the suffix 'ol'. Example, ethane (alkane) becomes ethanol (alcohol) 3.The positions of the alkyl and hydroxyl groups that the attached to the carbon chain are shown by numbering the carbon atoms. The hydroxyl group must always get the smallest possible number. Example 1 (Propan-2-ol) Longest chain: 3 carbon (propanol) Position of hydroxyl group: 2 Alkyl: -
  • 2. Example 2 (Pentan-1-ol) Longest chain: 5 carbon (pentanol) Position of hydroxyl group: 1 Alkyl: - Example 3 (2-methylpropan-2-ol) Longest chain: 3 carbon (propanol) Position of hydroxyl group: at C2 Alkyl: Methyl at 2nd carbon
  • 3. Example 4 (3-methylbutan-1-ol) Longest chain: 4 carbon (butanol) Position of hydroxyl group: at C1 Alkyl: Methyl at 3rd carbon Example 5 (2,2-dimethylpropan-1-ol) Longest chain: 3 carbon (propanol) Position of hydroxyl group: At C1 Alkyl: 2 Methyl, both at 2nd carbon