Diacetylene
208217
178420071
2007-12-17T02:01:25Z
VVVBot
4099039
robot Adding: [[ru:Диацетилен]]
{{Chembox new
| ImageFile = Diacetylene.png
| ImageSize =
| IUPACName =
| OtherNames = 1,3-butadiyne, buta-1,3-diyne, biacetylene, butadiyne
| Section1 = {{Chembox Identifiers
| CASNo = 460-12-8
| PubChem =
| SMILES = C#CC#C
}}
| Section2 = {{Chembox Properties
| Formula = C<sub>4</sub>H<sub>2</sub>
| MolarMass = 50.046 g/mol
| Appearance = Gas
| Density =
| MeltingPt = -10 °C
| BoilingPt = 10 °C
| Solubility =
}}
| Section3 = {{Chembox Hazards
| MainHazards = Highly flammable
| FlashPt =
| Autoignition =
| RPhrases = {{R11}} {{R19}}
}}
}}
'''Diacetylene''' (also known as '''butadiyne'''), with the formula C<sub>4</sub>H<sub>2</sub>, is a highly [[alkyne|unsaturated]] [[hydrocarbon]] that contains one [[single bond]] and two [[triple bond]]s. It is the first in the series of [[polyyne]]s.
== Occurrence in Nature ==
Diacetylene has been identified in the atmosphere of [[Titan (moon)|Titan]] and in the [[protoplanetary nebula]] [[CRL 618]] by its characteristic vibrational modes. The molecule is mostly likely to have formed in Titan's atmosphere by a reaction between [[acetylene]] and the [[ethynyl radical]] C<sub>2</sub>H, which is produced when acetylene undergoes [[photolysis]]. This radical can in turn attack the triple bond in acetylene and react efficiently even at cold temperatures.
== See also ==
* [[Acetylene]]
* [[Hydrocarbon]]
[[Category:Alkynes]]
{{hydrocarbon-stub}}
[[ru:Диацетилен]]