Monoxide Monoxide A monoxide is any oxide containing just one atom of oxygen in the molecule. For example, Potassium oxide (KO), has only one atom of oxygen, and is thus a monoxide. Water (HO) is also a monoxide; see dihydrogen monoxide hoax. A well known monoxide is carbon monoxide (CO); see carbon monoxide poisoning. Most of the members of the Periodic Table form oxides when oxidized. There are two main types of oxides: monoxides and dioxides. Monoxides (generally MO) such as silicon monoxide (SiO) only exist at high temperatures. Among monoxides, CO is neutral, GeO is distinctly acidic, and SnO and
Ethylene oxide oxide with compounds containing active methylene group leads to the formation of butyrolactones: Ethylene oxide enters into the Friedel–Crafts reaction with benzene to form phenethyl alcohol: Styrene can be obtained in one stage if this reaction is conducted at elevated temperatures () and pressures (), in presence of an aluminosilicate catalyst. A series of polynomial heterocyclic compounds, known as crown ethers, can be synthesized with ethylene oxide. One method is the cationic cyclopolymerization of ethylene oxide, limiting the size of the formed cycle: To suppress the formation of other linear polymers the reaction is carried out in a highly dilute