4. Please choose either Reaction A or Reaction B, and then provide the complete mechanism. The mechanism MUST include the formation of the "super electrophile." Then provide the reaction coordinate pathway starting from benzene + super electrophile. Be sure to include an energy access and labels for reactants, products, intermediates, energies of activation, and transition states. Reaction A NO2 Reaction B HNO3, H2SO4 CH;COCI, AICI,
Reactions of Ethers
Ethers (R-O-R’) are compounds formed by replacing hydrogen atoms of an alcohol (R-OH compound) or a phenol (C6H5OH) by an aryl/ acyl group (functional group after removing single hydrogen from an aromatic ring). In this section, reaction, preparation and behavior of ethers are discussed in the context of organic chemistry.
Epoxides
Epoxides are a special class of cyclic ethers which are an important functional group in organic chemistry and generate reactive centers due to their unusual high reactivity. Due to their high reactivity, epoxides are considered to be toxic and mutagenic.
Williamson Ether Synthesis
An organic reaction in which an organohalide and a deprotonated alcohol forms ether is known as Williamson ether synthesis. Alexander Williamson developed the Williamson ether synthesis in 1850. The formation of ether in this synthesis is an SN2 reaction.
![### Organic Chemistry Reaction Mechanisms
#### Question 4:
Please choose either Reaction A or Reaction B, and then provide the complete mechanism. The mechanism MUST include the formation of the "super electrophile." Then provide the reaction coordinate pathway starting from benzene + super electrophile. Be sure to include an energy access and labels for reactants, products, intermediates, energies of activation, and transition states.
#### Reaction A:
![Reaction A Diagram]
```
Benzene (C6H6) + HNO3, H2SO4 → Nitrobenzene (C6H5NO2)
```
**Reactants:**
- Benzene (C6H6)
- Nitric Acid (HNO3)
- Sulfuric Acid (H2SO4)
**Product:**
- Nitrobenzene (C6H5NO2)
**Mechanism Steps for Reaction A:**
1. Formation of Super Electrophile:
- HNO3 reacts with H2SO4 to form the nitronium ion (NO2⁺), the super electrophile, and a water molecule (H2O).
- \( HNO3 + H2SO4 \rightarrow NO2^+ + H2O + HSO4^- \)
2. Electrophilic Aromatic Substitution:
- Benzene donates a pair of π electrons to the nitronium ion (NO2⁺), forming a sigma complex (a cation intermediate).
- The sigma complex then loses a proton (H⁺), stabilizing into nitrobenzene (C6H5NO2).
#### Reaction B:
![Reaction B Diagram]
```
Benzene (C6H6) + CH3COCl, AlCl3 → Acetophenone (C6H5COCH3)
```
**Reactants:**
- Benzene (C6H6)
- Acetyl Chloride (CH3COCl)
- Aluminum Chloride (AlCl3)
**Product:**
- Acetophenone (C6H5COCH3)
**Mechanism Steps for Reaction B:**
1. Formation of Super Electrophile:
- CH3COCl reacts with AlCl3 to form the acylium ion (CH3CO⁺), the super electrophile, and AlCl4⁻.
- \( CH3COCl + AlCl3 \rightarrow CH3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6746fa6f-1856-443b-addc-ecae5d9da9b9%2F5f759efc-79e5-4f1c-bcdf-adb1bc98a6f2%2Fyd3ddmy_processed.jpeg&w=3840&q=75)
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