FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

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

Worldwide shipping

Quick and reliable shipping

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
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);
  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);
  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.
Return to the top