Alkanol Nomenclature

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Identify the IUPAC nomenclature for straight-chained alkanols from 1 to C8

  • The prefix of the names of straight-chained alkanols denotes the number of carbon atoms in the chain:
Prefix Meth Eth Prop But Pent Hex Hept Oct
Carbon atoms 1 2 3 4 5 6 7 8
  • All straight-chained alkanols have the suffix ‘-anol’:
    • ‘an’ denotes all single bonds between carbon atoms.
    • ‘ol’ denotes the presence of a hydroxy (OH) group.
  • When there is more than one possible position for the hydroxy group, a number denotes which carbon atom has the hydroxy group attached.
  • Examples include methanol (CH3OH) and 2-butanol (CH3CHOHCH2CH3).

Above: Structures of Methanol and Ethanol;

Below: Structures of Propanol and Butanol