In organic chemistry, a ketene is an organic compound of the form RR'C=C=O, where R and R' are two arbitrary monovalent chemical groups (or two separate...

Ketene cycloadditions are the reactions of the pi system of ketenes with unsaturated compounds to provide four-membered or larger rings. [2+2], [3+2]...

Alkyl ketene dimers (AKDs) are a family of organic compounds based on the 4-membered ring system of oxetan-2-one, which is also the central structural...

Alkylidene ketenes are a class of organic compounds that are of the form R2C=C=C=O. They are a member of the family of heterocumulenes (R2C=(C)n=O), and...

Ethenone is the formal name for ketene, an organic compound with formula C2H2O or H2C=C=O. It is the simplest member of the ketene class. It is an important...

presence of ketene formation when vaporizing. They reported that just like Vitamin E acetate, all three of these cannabinoid acetates produced ketene gas when...

an ethene chain. The chemical is also called ketene hydrate because it is the carbonyl hydrate of ketene. Its structure can also be considered as the...

4-diphenylisoxazole. Synthetically, they behave as ketene precursors or synthons. Ynols can interconvert with ketenes, much like enols can with aldehydes and ketones...

additive in transport fuel. In 1928, ketene production started using acetic acid made by oxidation of acetaldehyde. Ketene was initially used to make cellulose...

enol ethers of esters (−OR) or carboxylic acids (−COOH) are called silyl ketene acetals and have the general structure R3Si−O−C(OR)=CR2. These compounds...

reacted ketene as N-benzylacetamide reported that Vitamin E acetate, CBD-acetate, CBN-acetate and THC-O-acetate may break down to release ketene gas when...

The main process involves dehydration of acetic acid to give ketene at 700–750 °C. Ketene is thereafter reacted with acetic acid to obtain the anhydride:...

compound is converted into a ketene by loss of dinitrogen with accompanying 1,2-rearrangement. The Wolff rearrangement yields a ketene as an intermediate product...

decreasing extent, acetic anhydride is also prepared by the reaction of ketene (ethenone) with acetic acid at 45–55 °C and low pressure (0.05–0.2 bar)...

and produces a highly reactive ketene compound: These ketenes can be isolated using flash vacuum pyrolysis (FVP). Ketenes are highly electrophilic and can...

chloride, which can be undesirable. Ketene. At one time acetic anhydride was prepared by the reaction of ketene with acetic acid: H2C=C=O + CH3CO2H →...

are often prepared by dehydration of primary amides. RC(O)NH2 → RCN + H2O Ketene is produced by heating acetic acid and trapping the product: CH3CO2H → CH2=C=O...

ethoxyacetylene to ketene. A variety of substituted 1,3-Cyclobutanediones form upon spontaneous dimerization of disubstituted ketenes. 2,2,4,4-Tetramethylcyclobutanedione...

which is sometimes written as (CH2CO)2. It is formed by dimerization of ketene, H2C=C=O. Diketene is a member of the oxetane family. It is used as a reagent...

development. Upon photolysis, DNQ undergoes a Wolff rearrangement to form a ketene. The ketene adds water to form indene-carboxylic acid. Dammel, Ralph (1993)....

Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde...

the 1953 Nobel Prize in Chemistry. He is also known for his discovery of ketenes and of the Staudinger reaction. Staudinger, together with Leopold Ružička...

Köster in which a solution of diazomethane in diethyl ether is reacted with ketene. This reaction is based on a ring expansion of the cyclopropanone intermediate...

ketenyl anion contains a C=C=O allene-like functional group, similar to ketene, with a negative charge on either terminal carbon or oxygen atom, forming...

(molar mass: 42.04 g/mol, exact mass: 42.0106 u) may refer to: Ethenone, or ketene Ethynol, or hydroxylacetylene Oxirene This set index page lists chemical...

Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde...

Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde...

bases neutralize the resulting HCl. Such reactions will often proceed via ketene. A second major class of acetylation reactions are the Friedel-Crafts reactions...

Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde...

Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde...