Heptacene
From Wikipedia, the free encyclopedia
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| Names | |
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| Preferred IUPAC name
Heptacene | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C30H18 | |
| Molar mass | 378.474 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Heptacene is an organic compound and a polycyclic aromatic hydrocarbon and the seventh member of the acene or polyacene family of linear fused benzene rings.[1] This compound has long been pursued by chemists[2][3][4] because of its potential interest in electronic applications and was first synthesized but not cleanly isolated in 2006.[5][6] Heptacene was finally fully characterized in bulk by researchers in Germany and the United States in 2017.[7]
heptacene synthesis
The final step is a photochemical decarbonylization with a 1,2-dione bridge extruded as carbon monoxide. In solution heptacene is not formed because it is very unstable being a reactive DA diene and quickly reacts with oxygen or forms dimers. When on the other hand the dione precursor is dissolved in a PMMA matrix first, heptacene can be studied by spectroscopy. Heptacene has been studied spectroscopically at cryogenic temperatures in a matrix.[8] When dissolved in sulfuric acid the heptacene dication is reported to be stable at room-temperature for more than a year in absence of oxygen.[9] "[Isolated] solid heptacene has a half-life time of several weeks at room temperature."[10]
