diphenol การใช้

• The most prominent member is tetrabromobisphenol-A, which is prepared by direct bromination of the diphenol.
• Urushiols are naturally existing organic compounds that have the catechol skeleton structure and diphenol functionality but with alkyl groups substituted onto the aromatic ring.
• Google seems to say resorcinol ( meta-diol ) has a pka of 9.32 while para-diphenol is 9.8.
• Caffeic acid and related " o "-diphenols are rapidly oxidized by " o "-diphenol oxidases in tissue extracts.
• The key difference between the two related enzymes is that tyrosinase can catalyze the hydroxylation of monophenols to diphenols ( monophenolase activity ) as well as the oxidation of the o-diphenol to the o-quinone ( diphenolase activity ) whereas catechol oxidase only possesses diphenolase activity.
• And of course, the further away the two groups are from each other, the weaker the inductive effect, so it's why the para-diphenol would have the highest pka's of all the diphenols, while the meta-diol would barely see any mesomeric effect and mostly see the inductive effect.