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Write the chemical equation for Williamson synthesis of 2-ethoxy -2- methyl pentane starting from ethanol and 2-methyl pentan-2-ol. |
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Answer» Solution :Williamson synthesis : Step 1 : `underset("Ethanol")(CH_3CH_2OH) underset((or) PBr_3)overset(HBr//Delta)(rarr) underset("Ethyl bromide")(CH_3-CH_2-Br) + H_2O` Step 2 : `underset(2-"methyl-pentan-2-ol")underset(CH_3)underset(|)overset(OH)overset(|)(C )-CH_2-CH_2-CH_3 overset(Na-"metal")(rarr) 2CH_3-underset("Sodium alkoxide")underset(CH_3)underset(|) overset(ONA)overset(|)(C )-CH_2-CH_2-CH_3 + H_2 uarr` Step 3 :  Williamsons synthesis occurs by `SN^2`- MECHANISM and primary alkyl halides are more reactive in `SN^(2)` REACTIONS. Therefore ethanol is converted into ethyl bromide. |
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