a)  Draw both chair conformations of the starting alkyl bromide. Indicate which conformation, if either is more stable. Briefly justify your answer. b)  The starting alkyl halide has two chiral carbons. What are the configurations (R/S) at each of these carbons? c)  Identify the mechanism (E1/E2) which reactions 1, 2, and 3 proceed by.

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a)  Draw both chair conformations of the starting alkyl bromide. Indicate which conformation, if either is more stable. Briefly justify your answer.

b)  The starting alkyl halide has two chiral carbons. What are the configurations (R/S) at each of these carbons?

c)  Identify the mechanism (E1/E2) which reactions 1, 2, and 3 proceed by.

d)  Provide mechanisms that explain the products formed in reactions 1, 2, and 3. All electron movement must be shown in order to receive full credit.

e)  Indicate which product is the major and which product is the minor in reactions 2 and 3. Briefly justify your answer.

The image depicts a chemical reaction where a brominated cyclohexane undergoes a dehydrobromination process in the presence of water and heat. Here's a breakdown of the reaction:

**Reactant:**
- The starting molecule is a brominated cyclohexane with the bromine (Br) and two methyl groups (CH₃) attached to the ring.

**Reaction Conditions:**
- Heat and water (H₂O) are applied.

**Products:**
- The reaction yields two major organic products:
  1. A cyclohexene ring with a methyl group (CH₃) attached to one of the carbon atoms in the double bond.
  2. A second cyclohexene structure, also with a methyl group attached to one of the carbons in the double bond.

- Hydrobromic acid (HBr) is produced as a by-product of the reaction.

This type of reaction is commonly observed in organic chemistry where elimination reactions transform alkyl halides into alkenes.
Transcribed Image Text:The image depicts a chemical reaction where a brominated cyclohexane undergoes a dehydrobromination process in the presence of water and heat. Here's a breakdown of the reaction: **Reactant:** - The starting molecule is a brominated cyclohexane with the bromine (Br) and two methyl groups (CH₃) attached to the ring. **Reaction Conditions:** - Heat and water (H₂O) are applied. **Products:** - The reaction yields two major organic products: 1. A cyclohexene ring with a methyl group (CH₃) attached to one of the carbon atoms in the double bond. 2. A second cyclohexene structure, also with a methyl group attached to one of the carbons in the double bond. - Hydrobromic acid (HBr) is produced as a by-product of the reaction. This type of reaction is commonly observed in organic chemistry where elimination reactions transform alkyl halides into alkenes.
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