Acidity of phenols

20,802 views 12 slides Oct 02, 2020
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About This Presentation

Acidity of Phenols/OC -II PCI Syllabus/Effect of substituents on acidity of phenols

Hi dear students, in this video I had explained about acidity of Phenols and Effect of substituents on acidity of phenols. I had tried to explain all the points by animations. So don't hasitate to study now, See...


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Acidity of phenols

3 Phenols are more acidic than alcohols because the phenoxide anion is resonance-stabilized by the aromatic ring. Sharing the negative charge over the ring increases the stability of the phenoxide anion and thus increases the tendency of the corresponding phenol to dissociate (Figure ). Figure: A resonance-stabilized phenoxide ion is more stable than an alkoxide ion. Electrostatic potential maps show how the negative charge is more concentrated on oxygen in the methoxide ion but is less concentrated on the phenoxide oxygen. More stable Less stable

10 Most phenols, however, are not soluble in aqueous sodium bicarbonate (NaHCO3), but carboxylic acids are soluble. Thus, aqueous NaHCO 3 provides a method for distinguishing and separating most phenols from carboxylic acids.

12 Thanks! See video also? Video Link : https :// youtu.be/hOh8x_YCsHM You can find me at youtube channel: online ustaad ( https://www.youtube.com/channel/UCzCN5UTEjFAtCBtrcNOWbyA )