**Understanding the Bromination Reaction of Alkenes****Reaction Description:**In the following reaction, the starting compound is an alkene, more precisely 2-methyl-2-butene, which is depicted as follows:``` CH3 |CH3-C=CH-CH3 | H```When this compound undergoes a reaction with bromine (Br₂) in the presence of methanol (CH₃OH), a bromination reaction occurs. The product is formed through the addition of Br₂ across the double bond (C=C).**Procedure:**1. Initially, Br₂ interacts with the electron-rich double bond to form a cyclic bromonium ion. 2. Following this, a nucleophile (in this case, CH₃OH) attacks the more substituted carbon of the bromonium ion.3. This results in the formation of a bromohydrin where the bromine (Br) and methoxy group (OCH₃) are added anti to each other, meaning they add on opposite sides of the previously existing double bond.**Product Configuration:**The final product configuration will show that the bromine and methoxy groups are on adjacent carbons and oriented trans to each other, ensuring the anti addition mechanism is fulfilled.**Summary:**The product of the reaction is a bromohydrin with anti addition across the double bond:``` Br |CH3-C-CH-CH3 | | H3C OCH3```In this product:- One of the Carbons that was part of the double bond now carries a Br atom.- The adjacent Carbon carries a -OCH₃ group. - The Br and the -OCH₃ group are on opposite sides (trans arrangement).**Conclusion:**The described mechanism and resultant product are representative of typical electrophilic addition reactions seen with alkenes in the presence of halogens and alcohols.

The given reaction is bromination and opening of ring by CH3OH.

Answered: In the following reaction, what is the…

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In the following reaction, what is the configuration of the products? Br₂ CH3OH

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter22: Organic And Biological Molecules

Section: Chapter Questions

Problem 7RQ

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Concept explainers

Diol

In chemistry there are so many chemical compounds that have a hydroxyl group but a chemical compound having two hydroxyl groups (-OH) is termed as a diol. It also implies the presence of two alcohols whereas polyols contain two or more than two hydroxyl groups (-OH). Glycol or 1,2-diol is an aliphatic diol that has two alcohol groups on adjacent carbon atoms. In industries, the most commonly used diol is ethylene glycol.

Question

**Understanding the Bromination Reaction of Alkenes**

**Reaction Description:**
In the following reaction, the starting compound is an alkene, more precisely 2-methyl-2-butene, which is depicted as follows:

```
CH3
|
CH3-C=CH-CH3
|
H
```

When this compound undergoes a reaction with bromine (Br₂) in the presence of methanol (CH₃OH), a bromination reaction occurs. The product is formed through the addition of Br₂ across the double bond (C=C).

**Procedure:**
1. Initially, Br₂ interacts with the electron-rich double bond to form a cyclic bromonium ion.
2. Following this, a nucleophile (in this case, CH₃OH) attacks the more substituted carbon of the bromonium ion.
3. This results in the formation of a bromohydrin where the bromine (Br) and methoxy group (OCH₃) are added anti to each other, meaning they add on opposite sides of the previously existing double bond.

**Product Configuration:**
The final product configuration will show that the bromine and methoxy groups are on adjacent carbons and oriented trans to each other, ensuring the anti addition mechanism is fulfilled.

**Summary:**
The product of the reaction is a bromohydrin with anti addition across the double bond:
```
Br
|
CH3-C-CH-CH3
| |
H3C OCH3
```

In this product:
- One of the Carbons that was part of the double bond now carries a Br atom.
- The adjacent Carbon carries a -OCH₃ group.
- The Br and the -OCH₃ group are on opposite sides (trans arrangement).

**Conclusion:**
The described mechanism and resultant product are representative of typical electrophilic addition reactions seen with alkenes in the presence of halogens and alcohols.

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