What does epoxidation mean?
Epoxidation is a chemical reaction central to organic synthesis in which an oxygen atom is added across the double bond of an alkene to produce an epoxide—a highly strained three-membered ring containing one oxygen atom and two carbon atoms. Because this ring is reactive, epoxides serve as versatile intermediates for making alcohols, glycols, polymers, pharmaceuticals, and agrochemicals. The reaction is typically carried out with peracids such as m-chloroperbenzoic acid, or with metal catalysts in processes like the Sharpless and Jacobsen asymmetric epoxidations, which allow chemists to control the three-dimensional arrangement of the product with remarkable precision. The word derives from 'epoxide' combined with the suffix '-ation', indicating a process. Strictly technical and confined to chemistry and related sciences, 'epoxidation' has no figurative or everyday use, but it names a transformation so broadly useful that it underpins significant portions of modern industrial manufacturing.
nounA chemical reaction in which an oxygen atom is added across a carbon–carbon double bond to form an epoxide (a three-membered cyclic ether). More generally, the conversion of a compound into its epoxide derivative.
- The chemical reaction converting an alkene into an epoxide by adding an oxygen atom across the double bond.
"The epoxidation of cyclohexene with a peracid yields cyclohexene oxide in high yield."
"Industrial production of glycidol relies on the selective epoxidation of allyl alcohol."
"Students learned to carry out epoxidation using mCPBA as the oxidizing agent in their organic chemistry lab."
Plural is uncommon but grammatically valid when referring to multiple distinct instances of the reaction, especially in comparative studies of different methods or substrates.
"The paper compared several catalytic epoxidations of terminal alkenes."
The Sharpless asymmetric epoxidation was so transformative that it earned K. Barry Sharpless a share of the 2001 Nobel Prize in Chemistry.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of epoxidation
The term combines 'epoxide'—from Greek 'epi-' meaning 'upon' or 'over', referring to the bridging of the oxygen across the double bond—with '-oxide' from Greek 'oxys' meaning 'sharp' or 'acid'. The suffix '-ation' denotes the process or action. The concept emerged in late nineteenth- and early twentieth-century organic chemistry as chemists characterized these cyclic ethers and developed reliable methods for producing them.
Related word forms
How epoxidation is actually used
Strictly technical term used almost exclusively in organic chemistry and related scientific literature. It is a formal, neutral term with no figurative or colloquial use. Pronunciation is consistent across major English-speaking regions.
Easily confused with epoxidation
Peroxidation adds two oxygen atoms (forming a peroxide), whereas epoxidation forms the specific three-membered ring structure known as an epoxide.