Carbohydrates are classed as open-chain compounds, that is, they may be regarded as derivatives of the aliphatic hydrocarbons.
As before, only true ring nuclei, and not internal anhydrides of aliphatic compounds, will be mentioned.
They are compounds which greatly resemble the mixed ethers of the aliphatic series.
The azo-group is particularly active, both the aliphatic and aromatic compounds being coloured.
These observations may be summarized by saying that the benzene nucleus is more negative in character than the aliphatic residues.
What are commonly known as "fruity" odors belong mostly to what the chemist calls the fatty or aliphatic series.
aliphatic al·i·phat·ic (āl'ə-fāt'ĭk)
Of, relating to, or being a group of organic chemical compounds in which the carbon atoms are linked in open chains.
Relating to organic compounds whose carbon atoms are linked in open chains, either straight or branched, rather than containing a benzene ring. Alkanes, alkenes, and alkynes are aliphatic compounds. Compare aromatic.