Structure via PubChem · Public domain (PubChem)
ketene
Sign in to saveAlso known as Carbomethene, Keto-ethylene, Ethylenone
Ethenone is the formal name for ketene, an organic compound with formula or . It is the simplest member of the ketene class. It is an important reagent for acetylations.
Chemical data
- Formula
- C2H2O
- Molecular weight
- 42.04 g/mol
- IUPAC name
- ethenone
- SMILES
- C=C=O
- InChIKey
- CCGKOQOJPYTBIH-UHFFFAOYSA-N
- XLogP
- 0.8
- Polar surface area
- 17.1 Ų
- H-bond donors
- 0
- H-bond acceptors
- 1
- Formal charge
- 0
via PubChem
Wikidata facts
- Mass
- 42.011
Show 12 more facts
- chemical formula
- C₂H₂O
- NIOSH Pocket Guide ID
- 0367
- canonical SMILES
- C=C=O
- ionization energy
- 9.61
- melting point
- -151
- boiling point
- -49.81
- vapor pressure
- 1
- immediately dangerous to life or health
- 8.6
- time-weighted average exposure limit
- 0.9
- short-term exposure limit
- 3
- Commons category
- Ethenone
- electric dipole moment
- 1.422
Sources (3)
via Wikidata · CC0
~5 min read
Article
9 sectionsContents
- Properties
- Preparation
- History
- Natural occurrence
- Use
- Hazards
- References
- Literature
- External links
Ethenone is the formal name for ketene, an organic compound with formula or . It is the simplest member of the ketene class. It is an important reagent for acetylations.
== Properties == Ethenone is a highly reactive gas (at standard conditions) and has a sharp, irritating odour. It is reasonably stable only at low temperatures (−80 °C). It must therefore always be prepared for each use and processed immediately, otherwise a dimerization to diketene occurs, or polymers are formed that are difficult to handle. Its polymerization can be reduced by adding sulfur dioxide. Because of its cumulative double bonds, it adds readily to H-acidic compounds, reacting with water, for example, to form acetic acid, and with primary or secondary amines to yield the corresponding acetamides.