Difference between revisions of "Ethenone"
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===Relevant Sciencemadness threads=== | ===Relevant Sciencemadness threads=== | ||
*[http://www.sciencemadness.org/talk/viewthread.php?tid=65381 Copper and Acetone] | *[http://www.sciencemadness.org/talk/viewthread.php?tid=65381 Copper and Acetone] | ||
| + | *[http://www.sciencemadness.org/talk/viewthread.php?tid=8148 keten lamp] | ||
[[Category:Chemical compounds]] | [[Category:Chemical compounds]] | ||
Revision as of 16:42, 26 November 2017
| Names | |
|---|---|
| IUPAC name
Ethenone
| |
| Other names
Carbomethene
Ketene Keto-ethylene Methylene ketone Methyleneoxaethylene Oxoethylene | |
| Properties | |
| C2H2O | |
| Molar mass | 42.037 g/mol |
| Appearance | Colorless gas |
| Odor | Pungent, penetrating |
| Density | 0.65 g/cm3 (-60 °C) |
| Melting point | −150.5 °C (−238.9 °F; 122.6 K) |
| Boiling point | −56.1 °C (−69.0 °F; 217.1 K) |
| Reacts | |
| Solubility | Reacts with carboxylic acids Soluble in acetone, benzene, chloroform, ethanol Slightly soluble in diethyl ether |
| Thermochemistry | |
| Std enthalpy of
formation (ΔfH |
-87.24 kJ/mol |
| Hazards | |
| Safety data sheet | CPCB |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Ethenone, or simply ketene, is an organic compound with formula C2H2O or H2C=C=O. It is the simplest member of the ketene class. Ethenone is a tautomer of ethynol.
Contents
Properties
Chemical
Ethenone reacts with water to give acetic acid. Reaction with acetic acid gives acetic anhydride.
Physical
Ethenone is a colorless, toxic gas, with a strong pungent odor.
Availability
Due to its extreme toxicity, ethenone is not sold and has to be made in situ.
Preparation
Ethenone can be made by pyrolyzing acetone in oxygen-free atmosphere. Watch Doug's Lab two-part video for this procedure.
Projects
- Make acetic anhydride
- Make acetyl halide
Handling
Safety
Ethenone is extremely toxic, with a LD50 similar to that of phosgene and hydrogen cyanide.
DO NOT WORK WITH THIS CHEMICAL UNLESS YOU HAVE EXPERIENCE WORKING WITH VOLATILE LETHAL GASSES!
Storage
DO NOT STORE ETHENONE! Use it as soon as possible.
Disposal
Ethenone can be neutralized by dissolving it in an aqueous alkali solution. Perform the neutralization in a well ventilated area.
References
Relevant Sciencemadness threads
- Articles containing unverified chemical infoboxes
- Chembox articles without image
- Chemical compounds
- Inorganic compounds
- Organic compounds
- Ketenes
- Materials that react with water
- Materials unstable in acidic solution
- Materials unstable in basic solution
- Things that can kill you very quickly
- Things that should NOT be messed with except by professionals
- Choking agents
- Gases
