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 substitution sites in the same molecule). [1]

KETENE IS ONE OF THE MOST HIGHLY IRRITANT GASES TO THE RESP TRACT; ITS TOXICITY APPEARS TO BE OF THE SAME ORDER OF MAGNITUDE AS THAT OF PHOSGENE AND ALSO RESEMBLES PHOSGENE IN ITS DELAYED ACTION ON THE RESPIRATORY SYSTEM.

Substances with cumulated carbonyl and carbon-carbon double bonds are called ketenes and, as may be expected, have interesting and unusual properties. Ketene has a boiling point of −56° …

Ketenes by dehalogenation of a-Halo carboxylic acid derivatives The first prepared ketene

ketene, any of a class of organic compounds containing the functional grouping C=C=O; the most important member of the class being ketene itself, CH 2 =C=O, which is used in the manufacture of acetic anhydride and other industrial organic chemicals.

Mar 4, 2025 · Ketene is a valuable organic reagent, also known as ethenone, and it is high reactivity. German chemist Hermann Staudinger revealed the ketene preparation of organic compounds end of the 19 century. According to the Merck Index, ketene gas has a “penetrating” odor, colorless and toxic.

Ketene is a highly reactive compound that reacts with compounds that have an easily substituted hydrogen atom to produce acetic acid derivatives. The reaction of ketene with acetic acid to form acetic anhydride is the only significant industrial use of ketene.

Jun 27, 2016 · Ketene (systematic name ethenone) is a colorless, toxic gas with a “penetrating” odor, according to the Merck Index. It is soluble in essentially all organic solvents, but it decomposes in water to form acetic acid.

Ketenes are carbonyl compounds containing the CO group connected by a double bond to a carbon atom. Ketenes have the general formula RR′C CO, where R and R′ are hydrocarbon radicals. The simplest ketene (CH 2 C O, ethenone) also is named just ketene. Ketenes are reactive compounds that dimerize to diketenes.

Jan 18, 2006 · The existence of ketenes was established 100 years ago, and in recent years the pace of discovery in the study of these reactive intermediates has accelerated — extremely unstable ketenes such as dif...