Question 4 Predict the product for the following reaction sequence Br Ph;P CH3CH2CHCH2LI CH3CCH2CHa ether OH II II IV O Il

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Chapter1: Chemical Foundations
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**Question 4**

*Predict the product for the following reaction sequence*

The reaction sequence provided involves a series of transformations starting from a bromide compound, followed by treatment with triphenylphosphine (Ph₃P) and a Grignard reagent in ether. The structural options are labeled I through V, with each structure showing variations in functional groups and carbon chains.

**Reaction Details:**

1. The starting compound has a bromine (Br) substituent.
2. Phosphine (Ph₃P) is used to form a phosphonium salt.
3. The Grignard reagent, CH₃CH₂CH₂CH₂Li, reacts in the presence of ether.

**Options for Reaction Product:**

- **I**: Contains a hydroxyl group (OH)
- **II**: Lacks a functional group, maintaining a similar carbon skeleton to the reactant
- **III**: Features a carbonyl group (C=O)
- **IV**: Resembles II but may differ in connectivity or position
- **V**: Shows an elongated carbon chain without additional functional groups

The task is to determine which structure (I, II, III, IV, V) is the final product of the described reaction sequence.
Transcribed Image Text:**Question 4** *Predict the product for the following reaction sequence* The reaction sequence provided involves a series of transformations starting from a bromide compound, followed by treatment with triphenylphosphine (Ph₃P) and a Grignard reagent in ether. The structural options are labeled I through V, with each structure showing variations in functional groups and carbon chains. **Reaction Details:** 1. The starting compound has a bromine (Br) substituent. 2. Phosphine (Ph₃P) is used to form a phosphonium salt. 3. The Grignard reagent, CH₃CH₂CH₂CH₂Li, reacts in the presence of ether. **Options for Reaction Product:** - **I**: Contains a hydroxyl group (OH) - **II**: Lacks a functional group, maintaining a similar carbon skeleton to the reactant - **III**: Features a carbonyl group (C=O) - **IV**: Resembles II but may differ in connectivity or position - **V**: Shows an elongated carbon chain without additional functional groups The task is to determine which structure (I, II, III, IV, V) is the final product of the described reaction sequence.
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