Carbohydrates are classed as open-chain compounds, that is, they may be regarded as derivatives of the aliphatic hydrocarbons.
However, the ordinary aldehyde reactions of the sugars are more clearly indicated by the open-chain formula.
|open chain |
An arrangement of atoms of the same type that does not form a ring. Aliphatic compounds, such as ethane and isopropyl alcohol, are open-chain compounds.