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Product Code B321-5g
Price £64 ex. VAT

High purity 2,2'-bithiophene, for applications in organic electronics

For the synthesis of small molecules or polymer semiconductors


Specifications | MSDS | Literature and Reviews


2,2'-bithiophene (CAS number 492-97-7) is an intermediate widely used for the synthesis of small molecules or polymer semiconductors in application of organic electronics. It has proven that 2,2'-bithiophene exists as a mixture of the cis-like and the trans-like planar structures. 5,5'-positions of 2,2'-bithiophene are easily accessible for bromination and stannylation to give 5,5'-dibromo-2,2'-bithiophene or 5,5'-trimethylstannyl-2,2'-bithiophene, which can be used for direct arylation reactions.

Synthesis of 5,5-dibromo-2,2-bithiophene
Synthesis of 5,5’-dibromo-2,2’-bithiophene from 2,2’-bithiophene reacting with NBS in CHCl3
A synthesis precusor

A synthesis precusor

For bithiophene backboned polymers

Bithiophene building block

Bithiophene building block

For semiconductors, OFETs, and solar cells

Worldwide shipping for 492-97-7

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High purity 492-97-7

High purity

>99% High purity

General Information


CAS Number 492-97-7
Chemical Formula C8H6S2
Molecular Weight 166.26 g/mol
Synonyms 2,2′-Bithienyl, 2,2′-Dithienyl
2-(2-thienyl)thiophene
2-(thien-2-yl)thiophene
Classification / Family Thiophene, Bithiophene, Heterocyclic five-membered ring, Organic materials, Semiconductor Synthesis, Low band gap polymers, OFETs, Organic Photovoltaics, Polymer Solar Cells

Chemical Structure


Chemical structure of 2,2-bithiophene. CAS number 492-97-7
Chemical structure of 2,2-bithiophene. CAS number 492-97-7. Chemical formula C8H6S2.

Product Details


Purity 99%
Melting Point 32 °C - 33 °C
Appearance Yellowish liquid/solid

Characterisation by 1H-NMR (example)


1H NMR bithiophene in CDCl3
1H NMR spectrum of 2,2’-bithiophene in CDCl3: Instrument AVIIIHD400 (view full version)

MSDS Documentation


2,2'-bithiophene MSDS2,2'-bithiophene MSDS sheet

Literature and Reviews


  1. White light from an electroluminescent diode made from poly[3(4‐octylphenyl)‐2,2’‐bithiophene] and an oxadiazole derivative, M. Berggren et al, J. Appl. Phys. 76, 7530 (1994); http://dx.doi.org/10.1063/1.357984.
  2. Electronic structure of thiophene and pyrrole dimers: 2,2’‐bithiophene, 2,2’‐thienylpyrrole, and 2,2’‐bipyrrole, D. Birnbaum et al., J. Chem. Phys. 95, 4783 (1991); http://dx.doi.org/10.1063/1.461721.
  3. Highly Efficient Light-Harvesting Ruthenium Sensitizer for Thin-Film Dye-Sensitized Solar Cells, C-Y. Chen et al., ACS Nano, 3 (10), 3103–3109 (2009); DOI: 10.1021/nn900756s.
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