Biphenol

In organic chemistry, a biphenol refers to compounds with the formula (C6H4OH)2. Such compounds formally result from the coupling of two phenols. Three symmetrical isomers of biphenol exist:

• 2,2'-Biphenol (RN 1806–29–7) m.p. 109 °C
• 3,3'-Biphenol (RN 612–76–0) m.p. 124.8 °C
• 4,4'-Biphenol (RN 92–88–6) m.p. 283 °C

Additionally, three unsymmetrical isomers of biphenol exist:

• 2,3'-Biphenol (RN 31835–45–7)
• 2,4'-Biphenol (RN 611–62–1) m.p. 162-163 °C
• 3,4'-Biphenol (RN 18855–13–5) m.p. 190 °C