denfity the conformation as either s-cis or s-trans, where appropriate. Please also note vould be reactive in a Diels-Alder reaction. H3C H3C CH3 CH3 CH3 Br H3C Br

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**Question 1: Diene Analysis**

**Text:**
For the following dienes, identify whether the molecules have any cis or trans stereochemistry and identify the conformation as either s-cis or s-trans, where appropriate. Please also note whether the compound would be reactive in a Diels-Alder reaction.

**Diagram Description:**

The diagram shows three chemical structures of dienes:

1. **First Diene:**
   - Structure: 
     ```
        H3C
        │
     H3C=C
        │
       CH3
     ```
   - The molecule has a bromine (Br) attached and two methyl (CH3) groups attached to the carbons of the double bonds.

2. **Second Diene:**
   - Structure: 
     ```
       CH3
        │
     H2C=C
        │
       CH3
     ```
   - This molecule shows a simple diene with two methyl groups attached to the carbons of the double bonds, but no additional details visible in this diagram.

3. **Third Diene:**
   - Structure: 
     ```
       H3C         H3C
        │          │
    H3C=C          C=CH
        │          │
       Br         Br
     ```
   - This molecule features two bromine (Br) atoms along with methyl groups (CH3) attached to the carbons involved in the double bonds.

**Points to Consider:**

1. Identify **cis** or **trans** stereochemistry for each diene.
2. Determine if the diene exists in an **s-cis** or **s-trans** conformation.
3. Assess whether the diene is likely to participate in a **Diels-Alder reaction** based on its conformation.
Transcribed Image Text:**Question 1: Diene Analysis** **Text:** For the following dienes, identify whether the molecules have any cis or trans stereochemistry and identify the conformation as either s-cis or s-trans, where appropriate. Please also note whether the compound would be reactive in a Diels-Alder reaction. **Diagram Description:** The diagram shows three chemical structures of dienes: 1. **First Diene:** - Structure: ``` H3C │ H3C=C │ CH3 ``` - The molecule has a bromine (Br) attached and two methyl (CH3) groups attached to the carbons of the double bonds. 2. **Second Diene:** - Structure: ``` CH3 │ H2C=C │ CH3 ``` - This molecule shows a simple diene with two methyl groups attached to the carbons of the double bonds, but no additional details visible in this diagram. 3. **Third Diene:** - Structure: ``` H3C H3C │ │ H3C=C C=CH │ │ Br Br ``` - This molecule features two bromine (Br) atoms along with methyl groups (CH3) attached to the carbons involved in the double bonds. **Points to Consider:** 1. Identify **cis** or **trans** stereochemistry for each diene. 2. Determine if the diene exists in an **s-cis** or **s-trans** conformation. 3. Assess whether the diene is likely to participate in a **Diels-Alder reaction** based on its conformation.
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