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Chemistry
Posted 7 months ago

1. Answer ALL parts (a) - (c).
(a) Answer BOTH parts (i) and (ii)
(i) Predict the major product of the reaction shown below. Include in your answer a mechanism and account for any stereoselectivity you propose.
(4 marks)
(ii) Consider the scheme below.
- Provide a clear conformational drawing of the starting material for step 1
- Propose a structure for compound A\mathbf{A}, clearly showing any stereochemistry.
- Provide a mechanism for step 2 which accounts for the proposed structure of A\mathbf{A}.
( 7 marks)
(b) Answer BOTH parts (i) and (ii)
(i) Predict the major product of the reaction shown below. Include in your answer a mechanism, and account for any stereoselectivity you propose.
( 6 marks)
(ii) Predict the major product of the reaction shown below and account for any
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Answer from Sia
Posted 7 months ago
Solution
1
Predict the major product and mechanism for part (a)(i): Without the specific reaction details, a general approach involves considering the functional groups, the reagents, and the reaction conditions to predict the likely outcome
2
Account for stereoselectivity for part (a)(i): The mechanism should include any chiral centers formed and the preferred configuration based on the stereochemistry of the reactants and the stereo-determining step of the reaction
3
Conformational drawing for part (a)(ii): The starting material's most stable conformation is drawn, considering factors like steric hindrance and torsional strain
4
Propose structure for compound $A$ for part (a)(ii): Based on the reaction scheme, the structure of AA should be deduced, showing any relevant stereochemistry
5
Mechanism for step 2 for part (a)(ii): The mechanism should explain how the starting material transforms into compound AA, including any intermediates and transition states that account for the stereochemistry of AA
6
Predict the major product and mechanism for part (b)(i): Similar to part (a)(i), the major product is predicted based on the functional groups, reagents, and reaction conditions, and the mechanism is provided
7
Account for stereoselectivity for part (b)(i): The mechanism should explain the formation of any chiral centers and the preferred configuration, considering the stereo-determining step
8
Predict the major product for part (b)(ii): The major product is predicted based on the given reaction conditions and the nature of the reactants
1 Answer
[Insert final answer for part (a)(i) here]
2 Answer
[Insert final answer for part (a)(ii) here]
3 Answer
[Insert final answer for part (b)(i) here]
4 Answer
[Insert final answer for part (b)(ii) here]
Key Concept
Predicting the outcome of organic reactions involves understanding the reactivity of functional groups, the nature of the reagents, and the stereochemical implications of the reaction mechanisms.
Explanation
The answers provided would be based on a detailed analysis of the reaction conditions, the stability of intermediates, and the transition states leading to the final products, with a particular focus on the stereochemistry involved in each step.

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