Aromatic Hydrocarbon
Chapter Name : Hydrocarbons |
Sub Topic Code : 102_11_13_05_09 |
Topic Name : Aromatic Hydrocarbon |
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Sub Topic Name : Sulphonation |
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Introduction
An aromatic hydrocarbon or arene (or sometimes aryl hydrocarbon) is a hydrocarbon with alternating double and single bonds between carbon atoms forming rings.
Pre-Requisites:
Aromatic Hydrocarbon
Activity:
Vinegar.
Real Life Question:
What are aromatic hydrocarbons?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Sulphonate | A salt or ester of any sulphonic acid containing the ion RSO2O- or the group RSO2O-, R being an organic group. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Gasoline | Gasoline is transparent, petroleum-derived oil that is used primarily as a fuel in internal combustion engines. |
Real life uses :
Flavor.
Places to visit :
Pharmacy.
Practical examples around us
| Examples | Explainations |
|---|---|
| Pyridine | Pyridine is a basic heterocyclic organic compound with the chemical formula C5 H5 N. It is structurally related to benzene, with one methine group (=CH-) replaced by a nitrogen atom. |
What you learn in Theory:
A type of chemical reaction in which a –SO3H group is substituted on a benzene ring to form a sulphonic acid. The reaction is carried out by refluxing with concentrated sulphuric (VI) acid for a long period. It can also occur with cold disulphuric (VI) acid (H2S2O7). Sulphonation is an example of electrophilic substitution in which the electrophile is a sulphur trioxide molecule, SO3.
What you learn in Practice:
Sulfur trioxide is the electrophile in this electrophilic aromatic substitution generated from concentrated sulfuric acid (or fuming sulfuric acid) when heated. With benzene as substrate the reaction product is benzene sulfonic acid.