2,2'-Bithiophene
Chemical compound / From Wikipedia, the free encyclopedia
2,2′-Bithiophene is the organic compound. It is a colorless solid, although commercial samples are often greenish.[3] It is the most common of the three isomers with formula (C4H3S)2. The other two isomers have the connectivity 2,3′- and 3,3′-. The compound is typically prepared by cross-coupling starting from 2-halothiophenes.
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
2,2′-Bithiophene | |
Other names
2,2′-Bisthiophene, 2,2′-dithienyl, 2,2′-bithienyl, 2-(2-thienyl)thiophene | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.007.062 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C8H6S2 | |
Molar mass | 166.26 g·mol−1 |
Appearance | Colorless crystals |
Density | 1.44 g/cm3[1] |
Melting point | 31.1 °C (88.0 °F; 304.2 K)[2] |
Boiling point | 260 °C (500 °F; 533 K)[2] |
Structure[1] | |
Monoclinic | |
P21/c | |
a = 7.873 A, b = 5.771 A, c = 8.813 A α = 90°, β = 107.07°, γ = 90° | |
2 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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X-ray crystallography shows that the two rings are coplanar,[3] unlike the situation for biphenyl.