O: H CH3NH2 HBr (cat.) NCH 3 H + H₂O

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4.Give the mechanisms for the following:
### Transcription and Explanation of the Reaction

**Chemical Reaction:**

The image represents a chemical reaction involving an aldehyde, methylamine, and a catalyst. Here's the reaction broken down:

1. **Reactants:**
   - **Cyclohexanecarbaldehyde**: The initial molecule depicted as a hexagonal ring with a formyl group (CHO) attached, indicating an aldehyde group.
   - **Methylamine (CH₃NH₂)**: A simple primary amine with a methyl group (CH₃) attached to an amino group (NH₂).

2. **Catalyst:**
   - **HBr (Hydrobromic acid)**: Acts as a catalyst in the reaction, suggesting that it participates in the process without being consumed.

3. **Products:**
   - **N-Methylimine cyclohexane**: The major product, where the aldehyde group is converted to an imine group (N=CH₃) with the removal of the oxygen atom, indicating a condensation reaction.
   - **Water (H₂O)**: A byproduct of the reaction, resulting from the combination of the oxygen atom from the aldehyde group and hydrogen atoms.

**Diagram Explanation:**

- The structure on the left shows a cyclohexane ring with an aldehyde group (C=O) positioned at the point of substitution.
- The arrow indicates the reaction progression from reactants to products.
- On the right side, the product is shown as the cyclohexane ring now bearing an imine group (N=CH₃), suggesting the condensation of the aldehyde with the amine group, leading to the formation of an imine.
- Water is shown separately as a resultant byproduct of the reaction.

This reaction is an example of a condensation reaction, where an imine is synthesized from an aldehyde and an amine, with the loss of water, facilitated by a catalyst.
Transcribed Image Text:### Transcription and Explanation of the Reaction **Chemical Reaction:** The image represents a chemical reaction involving an aldehyde, methylamine, and a catalyst. Here's the reaction broken down: 1. **Reactants:** - **Cyclohexanecarbaldehyde**: The initial molecule depicted as a hexagonal ring with a formyl group (CHO) attached, indicating an aldehyde group. - **Methylamine (CH₃NH₂)**: A simple primary amine with a methyl group (CH₃) attached to an amino group (NH₂). 2. **Catalyst:** - **HBr (Hydrobromic acid)**: Acts as a catalyst in the reaction, suggesting that it participates in the process without being consumed. 3. **Products:** - **N-Methylimine cyclohexane**: The major product, where the aldehyde group is converted to an imine group (N=CH₃) with the removal of the oxygen atom, indicating a condensation reaction. - **Water (H₂O)**: A byproduct of the reaction, resulting from the combination of the oxygen atom from the aldehyde group and hydrogen atoms. **Diagram Explanation:** - The structure on the left shows a cyclohexane ring with an aldehyde group (C=O) positioned at the point of substitution. - The arrow indicates the reaction progression from reactants to products. - On the right side, the product is shown as the cyclohexane ring now bearing an imine group (N=CH₃), suggesting the condensation of the aldehyde with the amine group, leading to the formation of an imine. - Water is shown separately as a resultant byproduct of the reaction. This reaction is an example of a condensation reaction, where an imine is synthesized from an aldehyde and an amine, with the loss of water, facilitated by a catalyst.
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