Home
Class 12
CHEMISTRY
Comprehension E2 raction rarr Elimina...

Comprehension
`E_2` raction `rarr` Elimination bimolecular
In the general mechanism of the `E_2` reaction a strong base abstract a proton on a carbon atom adjacent to the one of the leaving group. As the abstracts a proton , a double bond forms and the leaving group leaves.

Identify the rate of reaction of given compounds in `E_2` reaction:

A

`a gt b gt c gt d`

B

`a gt c gt b gt d`

C

`b gt a gt c gt d`

D

`b gt d gt a gt c`

Text Solution

Verified by Experts

More good leaving group more `E_2` reaction.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ALKYL HALIDES (ELIMINATION REACTION)

    MS CHOUHAN|Exercise LEVEL-2|25 Videos

  • ALDEHYDES AND KETONES

    MS CHOUHAN|Exercise LEVEL-2|20 Videos

  • ALKYL HALIDES (SUBSTITUTION REACTIONS)

    MS CHOUHAN|Exercise LEVEL-2|41 Videos

Similar Questions

Explore conceptually related problems

Comprehension E_2 raction rarr Elimination bimolecular In the general mechanism of the E_2 reaction a strong base abstract a proton on a carbon atom adjacent to the one of the leaving group. As the abstracts a proton , a double bond forms and the leaving group leaves. Product (A) and (B) are :

Comprehension E_2 raction rarr Elimination bimolecular In the general mechanism of the E_2 reaction a strong base abstract a proton on a carbon atom adjacent to the one of the leaving group. As the abstracts a proton , a double bond forms and the leaving group leaves. Which of the following compound is inert toward E_2 reaction.

Comprehension E_2 raction rarr Elimination bimolecular In the general mechanism of the E_2 reaction a strong base abstract a proton on a carbon atom adjacent to the one of the leaving group. As the abstracts a proton , a double bond forms and the leaving group leaves. In given pairs, which compound is more reactive toward E_2 reaction (Q) CH_3 - underset((III))underset(Br) underset(|)CH-CH_3 " "CH_3 - underset((IV))underset(Br)underset(|)CH - CD_3 (S) underset(Ph- CH_3 -CH_2 Br " " Ph-underset(BrVIII)underset(|)CH-CH_3

The following bimolecular elimination reaction (E_2) is carried out with different halogen leaving groups. The per cent yield of the two products (2·hexene and I-hexene) for each leaving group is listed below. Which ofthe following statement is (are) true concerning this series of E_2 reactions?

An element occupies group no.13 and period number 2 is an representative element of that group reacts with carbondioxide and forms an oxide (A). (A) reacts with CuSO_(4) give blue beads (B). Identify the element compound (A) and (B). Write the reaction.

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained. How many products obtained in above reaction?

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained.

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained.

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained. What is R.D.S. of pinacol-pinacolone rearrangement?

Comprehension The first demonstration of the stereochemistry of the S_(N^2) reaction was carried out in 1934 by Prof. E.D Hughes and his colleagues at the University of London. They allowed (R) -2- iodooctane to react with radioactive iodide ion (""^(**)I-) The rate of substitution (rate constant K_5 ) was determined by measuring the rate of incorporation of radioactivity into the alkyl halide. The rate of loss of optical acitivity from the alkyl halide (rate constant K_0 ) was also determined under the same conditions: What ratio K_0//K_s is predicted for each of the following stereochemical scenarios : For inversion reaction :

Home
Profile