Alcohols And Phenols
Chapter Name : Alcohols, Phenols And Ethers |
Sub Topic Code : 102_12_11_04_04 |
Topic Name : Alcohols And Phenols |
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Sub Topic Name : Preparation Of Phenols From Haloarenes |
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Introduction
Phenols, sometimes called phenolics, are a class of chemical compounds consisting of a hydroxyl group (—OH) bonded directly to an aromatic hydrocarbon group.
Pre-Requisites:
Phenols
Activity:
Tannin.
Real Life Question:
What are the applications of Phenols?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Haloarenes | Haloarene is a molecule where a halogen atom is bonded to a carbon atom that is part of an aryl ring. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Polyphenol | A structural class of mainly natural, but also synthetic or semisynthetic, organic chemicals characterized by the presence of large multiples of phenol structural units. |
Real life uses :
Tannins are used in the tanning industry.
Places to visit :
Pharmacy.
Practical examples around us
| Examples | Explainations |
|---|---|
| Tannin | Tannin (also known as vegetable tannin, natural organic tannins or sometimes tannoid, i.e. a type of biomolecule, as opposed to modern synthetic tannin) is an astringent, bitter plant polyphenolic compound that binds to and precipitates proteins and various other organic compounds including amino acids and alkaloids. |
What you learn in Theory:
Phenols, sometimes called phenolics, are a class of chemical compounds consisting of a hydroxyl group (—OH) bonded directly to an aromatic hydrocarbon group.
What you learn in Practice:
Chlorobenzene (a haloarene) is hydrolyzed by treating it with 10% NaOH at 623 K and 320 atmospheric pressure in presence of Cu catalyst. Phenol is obtained by acidification of sodium phenoxide.