OH + alcohol immediate precursors MgBr CH3CH,MgBr A B H. `MgBr H3C D E F

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Please explain why C and D are the precursors

### Reaction Scheme Overview

This diagram depicts the synthesis of an alcohol from its immediate precursors. The main components shown include the target alcohol and several possible precursor compounds labeled A through F.

#### Target Alcohol:
- **Chemical Structure:** A secondary alcohol with an OH group attached to a central carbon. This carbon is bonded to two phenyl rings (aromatic benzene rings), making it a biphenyl alcohol structure.
- **Label:** Alcohol

#### Possible Precursors:

1. **Structure A:**
   - Contains a benzaldehyde moiety.
   - Features an aldehyde group attached to a phenyl ring.

2. **Structure B:**
   - A Grignard reagent, specifically ethylmagnesium bromide (CH₃CH₂MgBr).

3. **Structure C:**
   - Another Grignard reagent, phenylmagnesium bromide, with a phenyl group attached to magnesium bromide.

4. **Structure D:**
   - Contains a benzaldehyde moiety with an aldehyde group on a different side compared to structure A but similar in format.

5. **Structure E:**
   - Features acetaldehyde, an aldehyde with a methyl group attached to the carbonyl group.

6. **Structure F:**
   - A Grignard reagent with benzylmagnesium bromide, having a benzyl group attached to magnesium bromide.

### Conclusion:
This diagram illustrates the choice of chemical precursors that could potentially undergo a reaction to form the target alcohol through Grignard synthesis. The conversion involves the reaction between a Grignard reagent and a suitable carbonyl-containing compound.
Transcribed Image Text:### Reaction Scheme Overview This diagram depicts the synthesis of an alcohol from its immediate precursors. The main components shown include the target alcohol and several possible precursor compounds labeled A through F. #### Target Alcohol: - **Chemical Structure:** A secondary alcohol with an OH group attached to a central carbon. This carbon is bonded to two phenyl rings (aromatic benzene rings), making it a biphenyl alcohol structure. - **Label:** Alcohol #### Possible Precursors: 1. **Structure A:** - Contains a benzaldehyde moiety. - Features an aldehyde group attached to a phenyl ring. 2. **Structure B:** - A Grignard reagent, specifically ethylmagnesium bromide (CH₃CH₂MgBr). 3. **Structure C:** - Another Grignard reagent, phenylmagnesium bromide, with a phenyl group attached to magnesium bromide. 4. **Structure D:** - Contains a benzaldehyde moiety with an aldehyde group on a different side compared to structure A but similar in format. 5. **Structure E:** - Features acetaldehyde, an aldehyde with a methyl group attached to the carbonyl group. 6. **Structure F:** - A Grignard reagent with benzylmagnesium bromide, having a benzyl group attached to magnesium bromide. ### Conclusion: This diagram illustrates the choice of chemical precursors that could potentially undergo a reaction to form the target alcohol through Grignard synthesis. The conversion involves the reaction between a Grignard reagent and a suitable carbonyl-containing compound.
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