Obtaining 2-Methylpentane-2-ol from 2-Methylpent-1-ene

To obtain 2-methylpentane-2-ol from 2-methylpent-1-ene, a two-step process involving hydration and oxidation reactions is typically employed. This can be achieved through the following steps:

Step 1: Hydration Reaction
The hydration of 2-methylpent-1-ene involves the addition of water across the double bond, resulting in the formation of an alcohol. This reaction can be carried out using acid-catalyzed hydration. Here's how it can be done:

1. Take a round-bottom flask and add 2-methylpent-1-ene to it.
2. Next, add a suitable acid catalyst such as sulfuric acid (H2SO4) or phosphoric acid (H3PO4) to the flask.
3. Slowly add water to the flask while stirring the mixture.
4. Continue stirring the reaction mixture for some time to ensure complete hydration.
5. After the reaction is complete, separate the organic and aqueous layers. The organic layer will contain the desired product, 2-methylpentan-2-ol.

Step 2: Oxidation Reaction
The oxidation of 2-methylpentan-2-ol is performed to convert the primary alcohol into a secondary alcohol. This can be achieved using a mild oxidizing agent such as pyridinium chlorochromate (PCC) or potassium dichromate (K2Cr2O7) in the presence of an acid. Here's how it can be carried out:

1. Take the organic layer obtained from the hydration reaction and transfer it to a clean round-bottom flask.
2. Add the mild oxidizing agent, such as PCC or K2Cr2O7, to the flask.
3. Add a suitable acid, such as acetic acid (CH3COOH), to the mixture as a co-solvent.
4. Stir the reaction mixture at a suitable temperature for the oxidation to occur. The reaction typically proceeds at room temperature or slightly elevated temperatures.
5. After the reaction is complete, the resulting product will be 2-methylpentane-2-ol.

Summary
To summarize, the process of obtaining 2-methylpentane-2-ol from 2-methylpent-1-ene involves a two-step procedure. First, the hydration of 2-methylpent-1-ene using acid catalysis results in the formation of 2-methylpentan-2-ol. Then, the oxidation of 2-methylpentan-2-ol using a mild oxidizing agent converts the primary alcohol into the desired secondary alcohol.

By using acid catalysed rxn where reagent used is dil H2SO4 that follows markownikoff's rule.