Ethenol
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Surname | Ethenol | |||||||||||||||
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Molecular formula | C 2 H 4 O | |||||||||||||||
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properties | ||||||||||||||||
Molar mass | 44.05 g mol −1 | |||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Ethenol , also known as vinyl alcohol , hydroxyethene or hydroxyethylene , is an unstable unsaturated alcohol ( alkenol ) with the chemical formula C 2 H 4 O (H 2 C = CHOH).
Tautomerism
Vinyl alcohol is the simplest enol ; it isomerizes in the free state under normal conditions immediately to its tautomer acetaldehyde , provided it is not stabilized - for example as an iron carbonyl or platinum complex Pt (acac) (η 2 -C 2 H 3 OH) Cl. Ethenol ethers ( vinyl ethers ) and esters ( vinyl esters ) are also stable .
The thermoplastic polyvinyl alcohol (PVA or PVOH), which is derived from this monomer , can therefore only be produced indirectly through the polymerization of vinyl acetates and the subsequent hydrolysis of polyvinyl acetates .
Interstellar occurrence
Between May and June 2001, astronomers AJ Apponi and Barry E. Turner found ethenol in the Sagittarius B molecular cloud at the National Science Foundation's 12 m radio telescope at the Kitt Peak National Observatory .
Individual evidence
- ↑ harmonized classification for this substance . A labeling of vinyl alcohol in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 8, 2018, is reproduced from a self-classification by the distributor . There is not yet a
- ↑ FA Cotton, JN Francis, BA Frenz, M. Tsutsui: Structure of a dihapto (vinyl alcohol) complex of platinum (II) , in: Journal of the American Chemical Society , 1973 , 95 , pp. 2483-2486. doi: 10.1021 / ja00789a011 .
- ↑ Entry on vinyl alcohol. In: Römpp Online . Georg Thieme Verlag, accessed on December 4, 2011.
- ↑ BE Turner, AJ Apponi: Microwave Detection of Interstellar Vinyl Alcohol, CH 2 = CHOH , in: Astrophysical Journal , 561, L207-L210, 2001 November 10; Full text .