|Preferred IUPAC name
3D model (JSmol)
|Molar mass||73.074 g·mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|(what is ?)|
The hexatriynyl radical, C6H, is an organic radical molecule consisting of a chain of six carbon atoms terminated by a hydrogen.
The radical can be synthesized by photolysis. Two different examples involve
In 2006 the negatively charged hexatriyne anion of this molecule, C6H−, was the first negatively charged ion to be discovered to exist in the interstellar medium, using the Green Bank Telescope. Negative ions were thought to be unstable in this environment due to the prevalence of ultraviolet light, which dislodges extra electrons such as this.
The laboratory synthesis starts from acetylene C2H2. The reaction takes place within a DC discharge at reduced pressure in a mixture with 15% argon. The product is observed by millimeter-wave spectroscopy.
The two species C4H− and C8H− have also been detected.