Chemistry

How the direct hydration of alkene is done ?

The direct hydration of alkene leads to the formation of alcohols. The reaction takes place according to the markovnikov’s rules for addition reaction. For example we can make 2-methyl propan-2-ol (tertiary – butyl alcohol) from 2- methyl propene (Isobutylene) as shown in the above reaction.

How alkene reacts with hypohalus acid (HOX) ?

It is a type of addition reaction in which the hydroxyl and halogen groups are introduced in alkene molecule . The alkenes react with freshly prepared solution of hypohalus acid. The acid is formed by the reaction of dihalogen with water. The hypohalus acid gives Halohydrin on reacting with alkene.

Why the but-2-ene is major product of beta elimination of 2-Bromobutane ?

This is due to the following reason :- This is in accordance with sytzeff rule that whenever two alkenes are theoretically possible during a dehydrohalogenation reaction , it is always the more highly substituted alkene which predominates . It can also be best understood by the following illustrations showing the stabilizes of primary(1°) , secondary…

How we can prepare dibromoethane from ethene ?

We can make the dibromoethane from ethene by the addition of halogen in ethene , in the presence of carbon tetrachloride. In the presence of ether as a solvent the above reaction takes place. The dihalo products are formed in which the halogen groups are present on adjacent carbon atoms.

Mechanism for electrophillic addition reactions of alkenes

The mechanism involves the following steps :- Step 1 :- In first step the polarity is developed on the bromine molecule , and the partial positive side of the bromine molecule attacks on the carbon atom of the double bond. This leads to the formation of carbocation. Step 2 :- In second step the negative…

Why the alkenes give electrophillic addition reactions ?

Alkenes give electrophillic addition reactions because of the following reasons:- 1. The pie electrons of the double bond attract electrophiles . 2. The electron density is more on the C-C double bond , so the electrophiles preferably attack on it as compared to the electrophiles which are repelled.

What is the mechanism of acidic dehydration of monohybrid alcohol ?

The complete mechanism takes place in three steps as shown below :- Step 1 :- Step 1 involves the release of Hydronium ion (proton) and then the attack of proton on the lone pair electrons of oxygen. By this way protonated alcohol is formed. Step 2 :- This step is slow and rate determining step.…

How we can prepare alkene from alkyl halides ?

We can obtain the alkenes from alkyl halides by the Dehydrohalogenation. In this kind of reaction the halogen and hydrogen from adjacent carbon are removed to make a double bond in the presence of alcohlic KOH . The reaction is shown below.

What is cracking or pyrolysis of alkanes ?

It is a kind of reaction in which under suitable conditions of temprature and pressure a simple alkane can give various products. As shown below. Pyro means the heat and lysis means the breaking, so it is a process of breaking the alkanes in the presence of heat.

What are the products of the catalytic oxidation in alkanes.

The catalytic oxidation of alkanes leads to the formation of alcohols , aldehydes and carboxylic acids under various conditions . The detailed reactions are as follows :- 1. Prepration of alcohol on reaction with oxygen in the red hot copper tube. 2. Preparation of aldehyde This reaction takes place in the presence of Molybodinum trioxide.…

Mechanism of substitution reactions of Alkanes

This kind of reactions involve the formation of free radical intermediates. Following are the steps of mechanism :- Step 1 :- Chain initiation In this step the bond in halide molecule breaks by a homolytic cleavage . And this leads to the formation of free radicals. Step 2 :- Chain propagation In this step the…

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Hi, I’m Ankush Sharma. post graduate in chemistry and organic chemistry specialist

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