Chemistry > Alcohols, Phenols and Ethers > 9.0 Chemical Properties of Ethers
Alcohols, Phenols and Ethers
1.0 Alcohols
2.0 Classification of alcohols
3.0 Physical properties of the alcohol
3.0 Physical properties of the alcohols
4.0 Preparation of Alcohol
4.1 By hydrolysis of alkyl halide
4.2 Acid catalysed hydration of alkenes
4.3 Oxymercuration Demercuration
4.4 Hydroboration-oxidation
4.5 Hydroxylation of alkenes
4.6 From organometallic compounds
4.6 Reduction of Esters
5.0 Grignard reagent
5.1 Reaction & Mechanism
5.2 Product of Grignard reagent
5.3 Planning a Grignard synthesis
5.4 Restriction of the use of Grignard reagents
6.0 Chemical properties of alcohols
6.1 Acidic character
6.2 Dehydration
6.3 Reaction with phosphorus trihalide or thionyl chloride
6.4. Reaction with hydrogen halide
6.5 Oxidation of Alchols
7.0 Tests for Alchols
8.0 Ethers
9.0 Chemical Properties of Ethers
10.0 Aryl Ethers
11.0 Epoxides
12.0 Phenols
13.0 Preparation of Phenol
14.0 Physical Properties of Phenol
15.0 Chemical properties of phenols
9.1 Mechanism: ???????
4.2 Acid catalysed hydration of alkenes
4.3 Oxymercuration Demercuration
4.4 Hydroboration-oxidation
4.5 Hydroxylation of alkenes
4.6 From organometallic compounds
4.6 Reduction of Esters
5.2 Product of Grignard reagent
5.3 Planning a Grignard synthesis
5.4 Restriction of the use of Grignard reagents
6.2 Dehydration
6.3 Reaction with phosphorus trihalide or thionyl chloride
6.4. Reaction with hydrogen halide
6.5 Oxidation of Alchols
In the first step ether is protonated by HX to give protonated ether. In the second step halide ion acts as nucleophile and attacks protonated ether to undergo cleavage. This step is favoured because the leaving group is weakly basic.
Reaction in second step can take the direction of $S{N^1}$ or $S{N^2}$ pathway depending upon the condition employed and the structure of ether. When both the alkyl groups are methyl or 1°. It will follow ${S_N}2$ reaction and when at least one of the alkyl group is $3^\circ $ the reaction follows ${S_N}1$ reaction.
