4,4'-biphenyldiol
Sign in to save4,4′-Biphenol is an organic compound with the formula / It is one of three symmetrical isomers of biphenol. It is a colourless crystalline solid with a high melting point. It is primarily used in the production of polymers, particularly liquid crystals where it imparts high thermal stability, and PPSU-type polysulfone (also called polyphenylenesulfone, or Radel R).
Chemical data
- Formula
- C12H10O2
- Molecular weight
- 186.21 g/mol
- IUPAC name
- 4-(4-hydroxyphenyl)phenol
via PubChem
Article
4 sectionsContents
- Synthesis
- Safety
- See also
- References
4,4′-Biphenol is an organic compound with the formula / It is one of three symmetrical isomers of biphenol. It is a colourless crystalline solid with a high melting point. It is primarily used in the production of polymers, particularly liquid crystals where it imparts high thermal stability, and PPSU-type polysulfone (also called polyphenylenesulfone, or Radel R).
==Synthesis== The industrial synthesis of 4,4′-biphenol was developed by Allan Hay in the 1960s. As the direct oxidative coupling of phenol gives a mixture of isomers, 4,4′-biphenol is instead prepared from 2,6-di-tert-butylphenol, where para-coupling is the only possibility. A reaction with oxygen produces phenol-radicals which undergo rapid dimerisation, ultimately forming a diphenoquinone. thumb|Synthesis of 4.4'-biphenol from 2,6-di-tert-butylphenol. Isobutylene is eliminated in the final stage.|center