Methylparaben is an ester used as a preservative in foods, beverages, and cosmetics. It is synthesized in the following reaction. What is the structure of methylparaben? O H₂N Multiple Choice H₂N CH₂ K OH OH + CH3OH H₂SO4

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### Educational Content: Methylparaben Synthesis

**Introduction:**

Methylparaben is an ester commonly used as a preservative in foods, beverages, and cosmetics. The chemical reaction below illustrates its synthesis.

**Chemical Reaction:**

- **Reactants:**
  - A compound featuring an aromatic ring with an -NH2 (amino) group and a -COOH (carboxylic) group.
  - Methanol (CH3OH).

- **Reagent:**
  - Sulfuric acid (H2SO4) is used as a catalyst.

- **Reaction Type:**
  - Esterification, where the carboxylic acid reacts with methanol to form an ester.

**Question:**
What is the structure of methylparaben?

**Multiple Choice Option:**

- The only visible structure shows an aromatic ring with an -NH2 group, a -COOCH3 group (indicating the ester linkage), and a -CH2OH group attached.

**Explanation:**
Recognizing the esterification reaction, the correct methylparaben structure involves substituting the hydrogen in the –COOH group of the initial reactant with a methyl group from methanol, forming the ester linkage –COOCH3.

**Graphs/Diagrams:**

- The diagram provided in the question shows the starting materials and the esterification catalyst under an arrow, indicating products not shown explicitly in the reaction scheme.

This synthesis pathway is an example of how small organic molecules can be modified to serve functional roles in everyday products.
Transcribed Image Text:### Educational Content: Methylparaben Synthesis **Introduction:** Methylparaben is an ester commonly used as a preservative in foods, beverages, and cosmetics. The chemical reaction below illustrates its synthesis. **Chemical Reaction:** - **Reactants:** - A compound featuring an aromatic ring with an -NH2 (amino) group and a -COOH (carboxylic) group. - Methanol (CH3OH). - **Reagent:** - Sulfuric acid (H2SO4) is used as a catalyst. - **Reaction Type:** - Esterification, where the carboxylic acid reacts with methanol to form an ester. **Question:** What is the structure of methylparaben? **Multiple Choice Option:** - The only visible structure shows an aromatic ring with an -NH2 group, a -COOCH3 group (indicating the ester linkage), and a -CH2OH group attached. **Explanation:** Recognizing the esterification reaction, the correct methylparaben structure involves substituting the hydrogen in the –COOH group of the initial reactant with a methyl group from methanol, forming the ester linkage –COOCH3. **Graphs/Diagrams:** - The diagram provided in the question shows the starting materials and the esterification catalyst under an arrow, indicating products not shown explicitly in the reaction scheme. This synthesis pathway is an example of how small organic molecules can be modified to serve functional roles in everyday products.
The image contains a multiple-choice question asking which structure correctly represents methylparaben. Three options are presented, each showing a chemical structure:

1. **Option 1:** A chemical structure shows a benzene ring with an amino group (NH₂) and an ester group (COOCH₃) attached.

2. **Option 2:** A chemical structure that also has a benzene ring, similar amino group (NH₂), and an ester group (COOCH₃) in para position, identical to the first option.

3. **Option 3:** The question is highlighted, indicating that this option is selected as the answer. It shows the same chemical structure as Options 1 and 2, featuring a benzene ring with an amino group (NH₂) and an ester group (COOCH₃).

There is also a fourth option:
- "None of the structures shown correctly represent methylparaben."

A blue dot indicates that Option 3 is selected. However, none of these structures accurately depict methylparaben, which should have a hydroxyl group on the benzene ring in addition to the ester group.
Transcribed Image Text:The image contains a multiple-choice question asking which structure correctly represents methylparaben. Three options are presented, each showing a chemical structure: 1. **Option 1:** A chemical structure shows a benzene ring with an amino group (NH₂) and an ester group (COOCH₃) attached. 2. **Option 2:** A chemical structure that also has a benzene ring, similar amino group (NH₂), and an ester group (COOCH₃) in para position, identical to the first option. 3. **Option 3:** The question is highlighted, indicating that this option is selected as the answer. It shows the same chemical structure as Options 1 and 2, featuring a benzene ring with an amino group (NH₂) and an ester group (COOCH₃). There is also a fourth option: - "None of the structures shown correctly represent methylparaben." A blue dot indicates that Option 3 is selected. However, none of these structures accurately depict methylparaben, which should have a hydroxyl group on the benzene ring in addition to the ester group.
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