nature of the Substit uen ts (ortho / paru us meta). Note : yon should have one synthetic Talke molecues from the picdure ettached and propose unique sym theses for auch molectule startiny from BENZINE Pay close attachment to the ve cessar 4 reactions reagerts and to the trating Dath for each molecaule (total f two propaed sy nitheses.)

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### Chemical Structures: Nitrobenzene and Phenol

#### 1. Nitrobenzene

**Structure Description:**
- **Benzene Ring:** A six-carbon ring with alternating double bonds, which form a hexagonal shape.
- **Substituent:** A nitro group (NO₂) attached to the benzene ring. The nitrogen is single-bonded to one of the benzene carbons, with two oxygen atoms attached: one via a double bond and the other via a single bond, carrying a negative charge (not shown but implied in nitro groups).

#### 2. Phenol

**Structure Description:**
- **Benzene Ring:** Similar to nitrobenzene, this structure contains a six-carbon ring with three alternating double bonds.
- **Substituent:** A hydroxyl group (OH) directly attached to one of the carbons in the benzene ring. The oxygen in the hydroxyl group is depicted with two lone pairs of electrons, indicating its ability to participate in hydrogen bonding.

### Educational Context:
These chemical structures are fundamental in organic chemistry. Nitrobenzene is often used in the production of aniline, a precursor to dyes and pigments, while phenol is an important building block in the synthesis of plastics and pharmaceuticals. Understanding these structures is critical for students studying aromatic compounds and their reactions.
Transcribed Image Text:### Chemical Structures: Nitrobenzene and Phenol #### 1. Nitrobenzene **Structure Description:** - **Benzene Ring:** A six-carbon ring with alternating double bonds, which form a hexagonal shape. - **Substituent:** A nitro group (NO₂) attached to the benzene ring. The nitrogen is single-bonded to one of the benzene carbons, with two oxygen atoms attached: one via a double bond and the other via a single bond, carrying a negative charge (not shown but implied in nitro groups). #### 2. Phenol **Structure Description:** - **Benzene Ring:** Similar to nitrobenzene, this structure contains a six-carbon ring with three alternating double bonds. - **Substituent:** A hydroxyl group (OH) directly attached to one of the carbons in the benzene ring. The oxygen in the hydroxyl group is depicted with two lone pairs of electrons, indicating its ability to participate in hydrogen bonding. ### Educational Context: These chemical structures are fundamental in organic chemistry. Nitrobenzene is often used in the production of aniline, a precursor to dyes and pigments, while phenol is an important building block in the synthesis of plastics and pharmaceuticals. Understanding these structures is critical for students studying aromatic compounds and their reactions.
**Title: Organic Synthesis Exercise**

**Description:**

**Task Instructions:**

1. **Objective:** Take molecules from the image attached and propose unique syntheses for each molecule starting from benzene.

2. **Guidance:** 
   - Pay close attention to the necessary reactions and reagents.
   - Consider the directing nature of the substituents (ortho/para versus meta).

3. **Requirement:** 
   - You should develop one synthetic path for each molecule.
   - Total of two proposed syntheses are required.

**Note:** This exercise aims to deepen understanding of organic synthesis and the effects of substituents on reaction pathways.
Transcribed Image Text:**Title: Organic Synthesis Exercise** **Description:** **Task Instructions:** 1. **Objective:** Take molecules from the image attached and propose unique syntheses for each molecule starting from benzene. 2. **Guidance:** - Pay close attention to the necessary reactions and reagents. - Consider the directing nature of the substituents (ortho/para versus meta). 3. **Requirement:** - You should develop one synthetic path for each molecule. - Total of two proposed syntheses are required. **Note:** This exercise aims to deepen understanding of organic synthesis and the effects of substituents on reaction pathways.
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Synthesis of nitrobenzene and phenol given below. 

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