Organic compounds that do not contain a benzene ring are called aliphatic . Organic Compounds 12.8. The most common of these groups are the hydrocarbon groups. Functional groups are commonly occurring atomic combinations that form compounds differing only in the variety of attached hydrocarbon groups. Ethers have an oxygen bond between two carbons.
Ethers are relatively inert and make good organic solvents.
Aldehydes and ketones have a carbon oxygen double bond. If the double bond is at the end of a chain the molecule is called an aldehyde. If the double bond occurs away from an end the compound is called a ketone. Organic Acids have a COOH group with a weakly held hydrogen atom that can be ionized in water. Most organic acids are very weak.