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
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Starting from a bromobenzene molecule, when it reacts with Br2 (bromine) in the presence of a catalyst FeBr3 (iron(III) bromide), determine the major product(s) formed.
### Possible Products:
#### Option 1:

- **Description:** A benzene ring with two bromine atoms (Br) attached at the 1st and 2nd positions (ortho positions).
#### Option 2:

- **Description:** A benzene ring with two bromine atoms (Br) attached at the 1st and 4th positions (para positions).
#### Option 3:

- **Description:** A benzene ring with two bromine atoms attached at the 1st and 3rd positions (meta positions), and FeBr2 also appears in the product.
### Explanation:
When bromobenzene reacts with bromine (Br2) in the presence of a catalyst like FeBr3, the reaction is a typical electrophilic aromatic substitution. The bromine atom already attached to the benzene ring directs the incoming bromine to the ortho and para positions due to its electron-donating effects and its influence on the electron density of the benzene ring.
Thus, the major products are usually the ortho and para substituted bromobenzenes:
1. **Ortho product:** benzene with bromines at positions 1 and 2.
2. **Para product:** benzene with bromines at positions 1 and 4.
Among these, para product is generally more stable and predominant due to steric hindrance being minimal compared to ortho substitution.
**Note:** Meta substitution is not favored in this reaction with the given reagents and conditions.
### Conclusion:
The major product of this reaction is likely the benzene ring with bromines at the 1st and 4th positions (para position).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f623ae2-71a6-45bd-90a9-b0f97d78dd01%2F081a3044-ee78-4d89-9cc1-815359e8c79a%2F4y233it_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Determine the Major Product(s) of the Following Reaction:**
### Reaction Equation:

Starting from a bromobenzene molecule, when it reacts with Br2 (bromine) in the presence of a catalyst FeBr3 (iron(III) bromide), determine the major product(s) formed.
### Possible Products:
#### Option 1:

- **Description:** A benzene ring with two bromine atoms (Br) attached at the 1st and 2nd positions (ortho positions).
#### Option 2:

- **Description:** A benzene ring with two bromine atoms (Br) attached at the 1st and 4th positions (para positions).
#### Option 3:

- **Description:** A benzene ring with two bromine atoms attached at the 1st and 3rd positions (meta positions), and FeBr2 also appears in the product.
### Explanation:
When bromobenzene reacts with bromine (Br2) in the presence of a catalyst like FeBr3, the reaction is a typical electrophilic aromatic substitution. The bromine atom already attached to the benzene ring directs the incoming bromine to the ortho and para positions due to its electron-donating effects and its influence on the electron density of the benzene ring.
Thus, the major products are usually the ortho and para substituted bromobenzenes:
1. **Ortho product:** benzene with bromines at positions 1 and 2.
2. **Para product:** benzene with bromines at positions 1 and 4.
Among these, para product is generally more stable and predominant due to steric hindrance being minimal compared to ortho substitution.
**Note:** Meta substitution is not favored in this reaction with the given reagents and conditions.
### Conclusion:
The major product of this reaction is likely the benzene ring with bromines at the 1st and 4th positions (para position).
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