How do you name epoxides and ethers?
1 Answer
There are several accepted ways of naming ethers and epoxides.
Explanation:
Ethers have two types of names.
1. Substitutive names
The compound is named as an alkane with an alkoxyalkane.
For example,
2. Functional class names
For example,
Epoxides
Epoxides have four types of names.
1. Substitutive names
The compound is named as an alkene with an epoxy substituent.
For example, 1,2-epoxybutane.
2. Functional class names
The compound is named as an epoxide of the corresponding alkene.
For example, 1,2-epoxybutane is also named as but-1-ene epoxide.
3. The Hantzsch-Widman name
The ring is named as a cyclopropane in which the
The three-membered saturated ring is indicated by the prefix "ir" ("tri" backwards without the "t") followed by the suffix "ane".
Thus, 1,2-epoxybutane is called ethyloxirane.
The O atom is automatically number 1, so the ethyl group is on C-2.
No locating number is necessary, because there is no such compound as 3-ethyloxirane.
4. As an oxide of the corresponding alkene (common name)
Examples are ethylene oxide and propylene oxide.
The first three methods are accepted by IUPAC.
The fourth is used only for simple alkenes such as ethylene, propylene, and butylene.