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Discuss preparation of: Vic-dihalides. |
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Answer» Solution :Vic-dihalides: Ethylene dichloride (1,2-Dichloro ethane) is PREPARED by the following methods. (a) Addition of chlorine to ethylene: `underset("Ethylene")(CH_(2)=CH_(2))+Cl_(2)to underset("Ethylene dichloride")(underset(Cl)underset(|)(C)H_(2)-underset(Cl)underset(|)(C)H_(2))`. (b) Action of `PCl_(5)` (or HCl) on ethylene glycol: `underset("Ethylene glycol")(underset(OH)underset(|)(C)H_(2)-underset(OH)underset(|)(C)H_(2))+2PCl_(5) to underset("Ethylene dichloride")(underset(Cl)underset(|)(C)H_(2)-underset(Cl)underset(|)(C)H_(2)+2POCl_(3))+2HCl` |
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